Update dependency python to 3.14

Author: renovate[bot]

.github/workflows/integrationtest.yaml

@@ -19,7 +19,7 @@ jobs:
 
       - uses: actions/setup-python@v6
         with:
-          python-version: '3.13'
+          python-version: '3.14'
           check-latest: true
 
       - name: Set up chart-testing

.github/workflows/pullrequest.yaml

@@ -21,7 +21,7 @@ jobs:
 
       - uses: actions/setup-python@v6
         with:
-          python-version: '3.13'
+          python-version: '3.14'
           check-latest: true
 
       - name: Set up chart-testing

.github/workflows/release.yaml

@@ -32,7 +32,7 @@ jobs:
       - name: Install Python
         uses: actions/setup-python@v6
         with:
-          python-version: '3.13'
+          python-version: '3.14'
 
       - name: Generate children charts
         run: |