Properly sort staging/* refs to get latest branch (#246)

.github/workflows/pick-to-staging.yml

@@ -25,7 +25,7 @@ jobs:
 
       - name: Fetch and checkout latest staging branch
         run: |
-          branch=$(git ls-remote --heads origin 'staging*' | tail -1 | awk 'gsub(".*refs/heads/","")')
+          branch=$(git ls-remote --heads origin 'staging/*' | awk 'gsub(".*refs/heads/","")' | sort -V | tail -1)
           git fetch origin $branch
           git checkout $branch