Update python version after deprecation of ubuntu 22 as ubuntu-latest

Author: brunoocasali

.github/workflows/tests.yaml

@@ -24,7 +24,7 @@ jobs:
 
       - uses: actions/setup-python@v5
         with:
-          python-version: 3.7
+          python-version: 3.14
 
       - name: Set up chart-testing
         uses: helm/chart-testing-action@v2.6.1
@@ -47,7 +47,7 @@ jobs:
 
       - uses: actions/setup-python@v5
         with:
-          python-version: 3.7
+          python-version: 3.14
 
       - name: Set up chart-testing
         uses: helm/chart-testing-action@v2.6.1