Restrict Python version to '3.14' in CI workflow

Updated Python version matrix to only include '3.14'.

Author: sba72

.github/workflows/test-build.yml

@@ -14,7 +14,7 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        version: [ '3.14', '3.13', '3.12' ]
+        version: [ '3.14' ]
         format: [ html, latex ]
     steps:
       - uses: actions/setup-python@master
@@ -45,7 +45,7 @@ jobs:
     runs-on: ubuntu-latest
     strategy:
       matrix:
-        version: [ '3.14', '3.13', '3.12' ]
+        version: [ '3.14' ]
     needs: [ 'build-translation' ]
     steps:
       - uses: actions/download-artifact@master
@@ -57,4 +57,4 @@ jobs:
       - uses: actions/upload-artifact@master
         with:
           name: build-${{ matrix.version }}-pdf
-          path: .
+          path: .