Fix readme links (#1109)

* fix links to docs now that we use readthedocs

* fix badge links in readme

.github/ISSUE_TEMPLATE/documentation.md

@@ -18,7 +18,7 @@ Please fill out the points below, as it will make our process much easier.
 Please tell us which page, or pages, from the documentation site (https://jrnl.sh) are
 affected in this issue
 -->
-  - <!-- example: https://jrnl.sh/overview -->
+  - <!-- example: https://jrnl.sh/en/stable/overview -->
 
 ### What Could Be Better?
 <!--

README.md

@@ -4,7 +4,10 @@
 </a>
 </p>
 
-jrnl ![Testing](https://github.com/jrnl-org/jrnl/workflows/Testing/badge.svg) [![Downloads](https://pepy.tech/badge/jrnl)](https://pepy.tech/project/jrnl) [![Version](http://img.shields.io/pypi/v/jrnl.svg?style=flat)](https://pypi.python.org/pypi/jrnl/)
+jrnl
+ [![Testing](https://github.com/jrnl-org/jrnl/workflows/Testing/badge.svg)](https://github.com/jrnl-org/jrnl/actions?query=workflow%3ATesting)
+ [![Downloads](https://pepy.tech/badge/jrnl)](https://pepy.tech/project/jrnl)
+ [![Version](http://img.shields.io/pypi/v/jrnl.svg?style=flat)](https://pypi.python.org/pypi/jrnl/)
 ====
 
 _To get help, [submit an issue](https://github.com/jrnl-org/jrnl/issues/new/choose) on
@@ -36,7 +39,7 @@ If you just call `jrnl`, you will be prompted to compose your entry - but you
 can also configure _jrnl_ to use your external editor.
 
 For more information, please read the
-[documentation](https://jrnl.sh/overview/).
+[documentation](https://jrnl.sh).
 
 ## Contributors