Fix link to upgrading doc

.gitlab/issue_templates/release.md

@@ -8,7 +8,7 @@ Make these changes in the main branch before releasing:
       see `.gitlab/issue_templates/update_all_components.md`
 * Update/review `docs/*` and make sure it matches the current state
   * [ ] Update how to checkout the latest stable tag
-  * [ ] Document how to upgrade in `docs/upgrade.md`
+  * [ ] Document how to upgrade in `docs/upgrading.rst`
 * [ ] Update dependencies in `requirements.txt` by following the
       instructions in `requirements.in`
 * [ ] Do a manual upgrade test from last release version to `main`
@@ -43,7 +43,7 @@ Create a MR for the new branch with the following changes:
 
 ## After release
 
-* [ ] Log into https://readthedocs.org and update documentation for tagged versions
+* [ ] Log into <https://readthedocs.org> and update documentation for tagged versions
 * [ ] Cherry-pick all changes from the release branch into main which
       shouldn't be only in the 0.4.0 branch (i.e. not the commit locking the
       dependencies)