Remove suffix in `concurrency: group: test-${{ github.ref }} (thanks @rhaschke for helping)

Author: rwgk

.github/workflows/ci.yml

@@ -13,7 +13,7 @@ on:
 permissions: read-all
 
 concurrency:
-  group: test-sh-avl${{ github.ref }} # TO BE REMOVED BEFORE MERGING INTO master
+  group: test-${{ github.ref }} # TO BE REMOVED BEFORE MERGING INTO master
   cancel-in-progress: true
 
 env: