TPT-4578: Add community contribution and hotfix labels (#235)

Author: zliang-akamai

.github/labels.yml

@@ -29,6 +29,12 @@
 - name: security
   description: for security fixes and improvements in the changelog.
   color: AA1111
+- name: community-contribution
+  description: contributions from the community.
+  color: 22ee47
+- name: hotfix
+  description: urgent fixes for production issues.
+  color: ff0000
 - name: ignore-for-release
   description: PRs you do not want to render in the changelog
   color: 7b8eac