Modify the script to invoke the bash shell outside of the loop

.github/workflows/tests.yml

@@ -35,6 +35,7 @@ jobs:
         # retries are added due to test failures with dependencies
       - name: Run tests
         run: |
+          bash -c '
           retries=0
           until [ $retries -ge 5 ]
           do
@@ -51,6 +52,6 @@ jobs:
               ((retries=retries+1))
             fi
           done
-        
+          '
 #      - name: Stop local test server
 #        run: docker-compose -p xmtp-ios -f dev/local/docker-compose.yml down