chore(pages/events): update events (#2347)

<!-- please provide a detailed description of the changes made in this
pull request. -->

## Description

This PR updates the events page.

![Screenshot 2024-06-12 at 23 57
36](https://github.com/gnolang/gno/assets/33522493/4d2583ac-52ae-47a0-abfd-31de7c73c95d)

Soon, we will have a `r/gnoland/events` realm that will simplify this
process of updating events through the CLI, instead of having to make a
PR every time. There is an open issue on this somewhere but I cannot
seem to find it.

<details><summary>Contributors' checklist...</summary>

- [x] Added new tests, or not needed, or not feasible
- [x] Provided an example (e.g. screenshot) to aid review or the PR is
self-explanatory
- [x] Updated the official documentation or not needed
- [x] No breaking changes were made, or a `BREAKING CHANGE: xxx` message
was included in the description
- [x] Added references to related issues and PRs
- [ ] Provided any useful hints for running manual tests
- [ ] Added new benchmarks to [generated
graphs](https://gnoland.github.io/benchmarks), if any. More info
[here](https://github.com/gnolang/gno/blob/master/.benchmarks/README.md).
</details>

examples/gno.land/r/gnoland/events/events.gno

@@ -35,17 +35,6 @@ func upcomingEvents() ui.Element {
 		ui.Text(`<div class="columns-3">
 <div class="column">
 
-### Gno @ Golang Serbia
-
-- Join the meetup
-- Belgrade, May 23, 2024
-
-[Learn more](https://www.meetup.com/golang-serbia/events/300975006/)
-
-</div><!-- end column-->
-
-<div class="column">
-
 ### GopherCon EU
 - Come Meet Us at our Booth
 - Berlin, June 17 - 20, 2024
@@ -86,6 +75,40 @@ func pastEvents() ui.Element {
 	return ui.Element{
 		ui.H2("Past Events"),
 		ui.Text(`<div class="columns-3">
+
+<div class="column">
+
+### Gno @ Golang Serbia
+
+- **Join the meetup**
+- Belgrade, May 23, 2024
+
+[Learn more](https://gno.land/r/gnoland/blog:p/gnomes-in-serbia)
+
+</div><!-- end column-->
+
+<div class="column">
+
+### Intro to Gno Tokyo
+
+- **Join the meetup**
+- Tokyo, April 11, 2024
+
+[Learn more](https://gno.land/r/gnoland/blog:p/gno-tokyo)
+
+</div><!-- end column-->
+
+<div class="column">
+
+### Go to Gno Seoul
+
+- **Join the workshop**
+- Seoul, March 23, 2024
+
+[Learn more](https://medium.com/onbloc/go-to-gno-recap-intro-to-the-gno-stack-with-memeland-284a43d7f620)
+
+</div><!-- end column-->
+
 <div class="column">
 
 ### GopherCon US

examples/gno.land/r/gnoland/events/events_filetest.gno

@@ -22,17 +22,6 @@ func main() {
 // <div class="columns-3">
 // <div class="column">
 //
-// ### Gno @ Golang Serbia
-//
-// - Join the meetup
-// - Belgrade, May 23, 2024
-//
-// [Learn more](https://www.meetup.com/golang-serbia/events/300975006/)
-//
-// </div><!-- end column-->
-//
-// <div class="column">
-//
 // ### GopherCon EU
 // - Come Meet Us at our Booth
 // - Berlin, June 17 - 20, 2024
@@ -72,6 +61,40 @@ func main() {
 // ## Past Events
 //
 // <div class="columns-3">
+//
+// <div class="column">
+//
+// ### Gno @ Golang Serbia
+//
+// - **Join the meetup**
+// - Belgrade, May 23, 2024
+//
+// [Learn more](https://gno.land/r/gnoland/blog:p/gnomes-in-serbia)
+//
+// </div><!-- end column-->
+//
+// <div class="column">
+//
+// ### Intro to Gno Tokyo
+//
+// - **Join the meetup**
+// - Tokyo, April 11, 2024
+//
+// [Learn more](https://gno.land/r/gnoland/blog:p/gno-tokyo)
+//
+// </div><!-- end column-->
+//
+// <div class="column">
+//
+// ### Go to Gno Seoul
+//
+// - **Join the workshop**
+// - Seoul, March 23, 2024
+//
+// [Learn more](https://medium.com/onbloc/go-to-gno-recap-intro-to-the-gno-stack-with-memeland-284a43d7f620)
+//
+// </div><!-- end column-->
+//
 // <div class="column">
 //
 // ### GopherCon US