Remove python-version: '3.9' in templates and correct template to point to PTB action

Author: ArBridgeman

.github/workflows/checks.yml

@@ -50,8 +50,6 @@ jobs:
 
       - name: Setup Python & Poetry Environment
         uses: ./.github/actions/python-environment
-        with:
-          python-version: "3.9"
 
       - name: Run changelog update check
         if: ${{ github.ref != 'refs/heads/main' }}
@@ -147,8 +145,6 @@ jobs:
 
       - name: Setup Python & Poetry Environment
         uses: ./.github/actions/python-environment
-        with:
-          python-version: "3.9"
 
       - name: Run format check
         run: poetry run -- nox -s project:format

exasol/toolbox/templates/github/workflows/checks.yml

@@ -56,9 +56,7 @@ jobs:
         uses: actions/checkout@v4
 
       - name: Setup Python & Poetry Environment
-        uses: ./.github/actions/python-environment
-        with:
-          python-version: "3.9"
+        uses: exasol/python-toolbox/.github/actions/[email protected]
 
       - name: Run changelog update check
         run: poetry run -- nox -s changelog:updated
@@ -149,8 +147,6 @@ jobs:
 
       - name: Setup Python & Poetry Environment
         uses: exasol/python-toolbox/.github/actions/[email protected]
-        with:
-          python-version: "3.9"
 
       - name: Run format check
         run: poetry run -- nox -s project:format