Fix link to rubyeventmachine.com (#1780)

As `rubyeventmachine.com` seems to be gone, link to GitHub repo instead.

locale/ca/about/index.md

@@ -62,5 +62,5 @@ compartir sockets entre processos per activar el balanceig de càrregues en els
 [`child_process.fork()`]: https://nodejs.org/api/child_process.html#child_process_child_process_fork_modulepath_args_options
 [`cluster`]: https://nodejs.org/api/cluster.html
 [bucle de eventos]: https://github.com/nodejs/node/blob/master/doc/topics/event-loop-timers-and-nexttick.md
-[Event Machine]: http://rubyeventmachine.com/
+[Event Machine]: https://github.com/eventmachine/eventmachine
 [Twisted]: http://twistedmatrix.com/

locale/de/about/index.md

@@ -70,5 +70,5 @@ ermöglichen.
 [`child_process.fork()`]: https://nodejs.org/api/child_process.html#child_process_child_process_fork_modulepath_args_options
 [`Cluster`]: https://nodejs.org/api/cluster.html
 [Ereignisschleife]: https://nodejs.org/en/docs/guides/event-loop-timers-and-nexttick/
-[Event Machine]: http://rubyeventmachine.com/
+[Event Machine]: https://github.com/eventmachine/eventmachine
 [Twisted]: http://twistedmatrix.com/

locale/en/about/index.md

@@ -65,5 +65,5 @@ over your cores.
 [`child_process.fork()`]: https://nodejs.org/api/child_process.html#child_process_child_process_fork_modulepath_args_options
 [`cluster`]: https://nodejs.org/api/cluster.html
 [event loop]: https://nodejs.org/en/docs/guides/event-loop-timers-and-nexttick/
-[Event Machine]: http://rubyeventmachine.com/
+[Event Machine]: https://github.com/eventmachine/eventmachine
 [Twisted]: http://twistedmatrix.com/

locale/es/about/index.md

@@ -61,5 +61,5 @@ el cual permite compartir sockets entre procesos para activar el balanceo de car
 [`child_process.fork()`]: https://nodejs.org/api/child_process.html#child_process_child_process_fork_modulepath_args_options
 [`cluster`]: https://nodejs.org/api/cluster.html
 [bucle de eventos]: https://github.com/nodejs/node/blob/master/doc/topics/event-loop-timers-and-nexttick.md
-[Event Machine]: http://rubyeventmachine.com/
+[Event Machine]: https://github.com/eventmachine/eventmachine
 [Twisted]: http://twistedmatrix.com/

locale/fr/about/index.md

@@ -68,5 +68,5 @@ vous pourrez communiquer facilement. Basé sur la même interface, le
 [`child_process.fork()`]: https://nodejs.org/api/child_process.html#child_process_child_process_fork_modulepath_args_options
 [`cluster`]: https://nodejs.org/api/cluster.html
 [boucle événnementielle]: https://nodejs.org/en/docs/guides/event-loop-timers-and-nexttick/
-[Event Machine]: http://rubyeventmachine.com/
+[Event Machine]: https://github.com/eventmachine/eventmachine
 [Twisted]: http://twistedmatrix.com/

locale/ja/about/index.md

@@ -107,5 +107,5 @@ Node はスレッドがない設計をしているという理由だけで、複
 [`child_process.fork()`]: https://nodejs.org/api/child_process.html#child_process_child_process_fork_modulepath_args_options
 [`cluster`]: https://nodejs.org/api/cluster.html
 [イベントループ]: https://nodejs.org/en/docs/guides/event-loop-timers-and-nexttick/
-[Event Machine]: http://rubyeventmachine.com/
+[Event Machine]: https://github.com/eventmachine/eventmachine
 [Twisted]: http://twistedmatrix.com/

locale/ko/about/index.md

@@ -103,13 +103,13 @@ Node는 스레드를 사용하지 않도록 설계되지만 멀티 코어 환경
 [`child_process.fork()`]: https://nodejs.org/api/child_process.html#child_process_child_process_fork_modulepath_args_options
 [`cluster`]: https://nodejs.org/api/cluster.html
 [event loop]: https://nodejs.org/en/docs/guides/event-loop-timers-and-nexttick/
-[Event Machine]: http://rubyeventmachine.com/
+[Event Machine]: https://github.com/eventmachine/eventmachine
 [Twisted]: http://twistedmatrix.com/
 -->
 
 [Blocking vs Non-Blocking]: https://nodejs.org/en/docs/guides/blocking-vs-non-blocking/
 [`child_process.fork()`]: https://nodejs.org/api/child_process.html#child_process_child_process_fork_modulepath_args_options
 [`cluster`]: https://nodejs.org/api/cluster.html
 [event loop]: https://nodejs.org/en/docs/guides/event-loop-timers-and-nexttick/
-[Event Machine]: http://rubyeventmachine.com/
+[Event Machine]: https://github.com/eventmachine/eventmachine
 [Twisted]: http://twistedmatrix.com/

locale/uk/about/index.md

@@ -66,5 +66,5 @@ HTTP є об'єктом першого роду в Node, розробленим
 [`child_process.fork()`]: https://nodejs.org/api/child_process.html#child_process_child_process_fork_modulepath_args_options
 [`cluster`]: https://nodejs.org/api/cluster.html
 [event loop]: https://nodejs.org/en/docs/guides/event-loop-timers-and-nexttick/
-[Event Machine]: http://rubyeventmachine.com/
+[Event Machine]: https://github.com/eventmachine/eventmachine
 [Twisted]: http://twistedmatrix.com/

locale/zh-cn/about/index.md

@@ -42,5 +42,5 @@ HTTP 是 Node 中的一等公民。它设计的是流式和低延迟。这使得
 [`child_process.fork()`]: https://nodejs.org/api/child_process.html#child_process_child_process_fork_modulepath_args_options
 [`cluster`]: https://nodejs.org/api/cluster.html
 [事件轮询]: https://nodejs.org/en/docs/guides/event-loop-timers-and-nexttick/
-[事件机]: http://rubyeventmachine.com/
+[事件机]: https://github.com/eventmachine/eventmachine
 [扭曲]: http://twistedmatrix.com/