Merge pull request #6298 from vector-im/dependabot/github_actions/actions/setup-python-4

Bump actions/setup-python from 3 to 4

.github/workflows/post-pr.yml

@@ -41,7 +41,7 @@ jobs:
     steps:
       - uses: actions/checkout@v3
       - name: Set up Python 3.8
-        uses: actions/setup-python@v3
+        uses: actions/setup-python@v4
         with:
           python-version: 3.8
       - uses: actions/cache@v3

.github/workflows/sync-from-external-sources.yml

@@ -13,7 +13,7 @@ jobs:
     steps:
       - uses: actions/checkout@v3
       - name: Set up Python 3.8
-        uses: actions/setup-python@v3
+        uses: actions/setup-python@v4
         with:
           python-version: 3.8
       - name: Install Prerequisite dependencies
@@ -40,7 +40,7 @@ jobs:
     steps:
       - uses: actions/checkout@v3
       - name: Set up Python 3.8
-        uses: actions/setup-python@v3
+        uses: actions/setup-python@v4
         with:
           python-version: 3.8
       - name: Install Prerequisite dependencies

.github/workflows/tests.yml

@@ -28,7 +28,7 @@ jobs:
           distribution: 'adopt'
           java-version: '11'
       - uses: gradle/gradle-build-action@v2
-      - uses: actions/setup-python@v3
+      - uses: actions/setup-python@v4
         with:
           python-version: 3.8
       - uses: michaelkaye/setup-matrix-synapse@v1.0.3