Fix zizmor-action version to v0.5.3

No v0 major version tag exists; pin to latest point release.

Author: dduugg

.github/workflows/zizmor.yml

@@ -22,4 +22,4 @@ jobs:
           persist-credentials: false
 
       - name: Run zizmor
-        uses: zizmorcore/zizmor-action@v0
+        uses: zizmorcore/zizmor-action@v0.5.3