docs: update release notes

Not a change that requires release notes but I want to test the new GH
actions check :)

Author: ellemouton

docs/release-notes/release-notes-0.13.1.md

@@ -20,4 +20,11 @@
 
 # Misc
 
-# Contributors (Alphabetical Order)
+* [Add 
+  release-notes](https://github.com/lightninglabs/lightning-terminal/pull/767) 
+  template and GitHub Actions check to ensure that they are always updated 
+  unless the `no-changelog` label is added to the PR.
+
+# Contributors (Alphabetical Order)
+
+* Elle Mouton