Improved release changelog template + added checklist item for linked GH issues (#185)

Co-authored-by: Marco Basile <[email protected]>

Author: BarcoMasile

.github/pull_request_template.md

@@ -20,6 +20,7 @@
 - [ ] I added tests to new or existing code
 - [ ] I removed hardcoded strings and used [`react-i18next`](https://react.i18next.com/) library ([useTranslation hook](https://react.i18next.com/latest/usetranslation-hook) and/or [Trans component](https://react.i18next.com/latest/trans-component)), see an example [here](https://github.com/aws/aws-parallelcluster-ui/commit/a6f1e2aa46b245b5bf7500a04b83195477a5cfa5)
 - [ ] I made sure no sensitive info gets logged at any time in the codebase (see [here](https://cheatsheetseries.owasp.org/cheatsheets/Logging_Cheat_Sheet.html)) (e.g. no user info or details, no stacktraces, etc.)
+- [ ] I made sure that any [GitHub issue](https://github.com/aws/aws-parallelcluster-ui/issues) solved by this PR is correctly linked
 - [ ] I checked that infrastructure/update_infrastructure.sh runs without any error
 - [ ] I checked that `npm run build` builds without any error
 - [ ] I checked that clusters are listed correctly

.github/release.yml

@@ -9,22 +9,26 @@ changelog:
       - wontfix
 
   categories:
-    - title: Features 🎉
+    - title: Features
       labels:
         - release:feature
 
-    - title: Changes 🏇
+    - title: Changes
       labels:
         - release:improvement
 
-    - title: Bugfixes 🐛
+    - title: Bugfixes
       labels:
         - release:bugfix
 
-    - title: Deprecated ☢️
+    - title: Deprecated
       labels:
         - release:deprecated
 
-    - title: Breaking Changes ☢️
+    - title: Breaking Changes
       labels:
         - release:breaking-change
+
+    - title: Known issues
+      labels:
+        - bug