Update PR workflow to cover multiple Python version

.github/workflows/pr-workflow.yml

@@ -9,7 +9,7 @@ jobs:
     runs-on: ubuntu-latest
     strategy:
       matrix:
-        python-version: ["3.10"]
+        python-version: ["3.10", "3.11", "3.12"]
 
     steps:
     - uses: actions/checkout@v4
@@ -33,7 +33,7 @@ jobs:
       uses: actions/upload-artifact@v4
       if: always()
       with:
-        name: pytest-results
+        name: pytest-results-py${{ matrix.python-version }}
         path: |
           htmlcov
           coverage.xml