ci: run tests on release/* branches

Add release/** to the CI trigger branches so that tests run on release branches
in addition to main and dev branches.

Author: blackopsrepl

.github/workflows/docker-publish.yml

@@ -5,6 +5,7 @@ on:
     branches:
       - main
       - dev
+      - 'release/**'
     paths:
       - 'rust/employee-scheduling/**'
       - 'legacy/employee-scheduling-fast/**'