release: pull back 0.13.1 and move CHANGELOG entries to 0.13.2 (#7881)

CHANGELOG.md

@@ -17,7 +17,7 @@ All notable changes to Gogs are documented in this file.
 - Submodules using `ssh://` protocol and a port number are not rendered correctly. [#4941](https://github.com/gogs/gogs/issues/4941)
 - Missing link to user profile on the first commit in commits history page. [#7404](https://github.com/gogs/gogs/issues/7404)
 
-## 0.13.1
+## 0.13.2
 
 ### Fixed