build coverage with 3.14

Author: ndgrigorian

.github/workflows/generate-coverage.yaml

@@ -51,7 +51,7 @@ jobs:
       - name: Setup Python
         uses: actions/setup-python@a309ff8b426b58ec0e2a45f0f869d46889d02405 # v6.2.0
         with:
-          python-version: '3.12'
+          python-version: '3.14'
           architecture: x64
 
       - name: Cache Gtest