Bump setup Python GHA to v4

(cherry picked from commit 99cf6df)

Conflicts:
	.github/workflows/test-supported-java-versions.yml

Author: acogoluegnes

.github/workflows/test-3.11-alpha.yml

@@ -21,7 +21,7 @@ jobs:
           repository: rabbitmq/tls-gen
           path: './tls-gen'
       - name: Set up Python
-        uses: actions/setup-python@v2
+        uses: actions/setup-python@v4
         with:
           python-version: '3.x'
       - name: Set up JDK