[tmp] Test WKBCH-26 workbench fix in tests workflow too

Author: dvasilas

.github/workflows/tests.yaml

@@ -53,7 +53,7 @@ jobs:
 
       - name: Start Workbench
         id: start-workbench
-        uses: scality/workbench@v0.14.0
+        uses: scality/workbench@21e956d9024ed334c450093c49c99a0cd50e3dc4
 
       - name: Wait for ClickHouse setup and fix permissions
         run: |