⏩ upgrade Helm to v3.19.5 in tests workflow

Author: aureq

.github/workflows/tests.yaml

@@ -24,7 +24,7 @@ jobs:
       - name: Set up Helm
         uses: azure/setup-helm@5119fcb9089d432beecbf79bb2c7915207344b78 # v3.5
         with:
-          version: v3.17.4
+          version: v3.19.5
 
       - name: Install chart unittest
         run: |