Update pip_install_pypiwin32.yml

Author: cclauss

.github/workflows/pip_install_pypiwin32.yml

@@ -15,13 +15,14 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        python-version: [3.x, 3.14t]
+        python-version: [3.12, 3.x, 3.14t]
         os: [windows-latest]
     runs-on: ${{ matrix.os }}
     steps:
       - uses: actions/checkout@v5
       - uses: actions/setup-python@v6
         with:
           python-version: ${{ matrix.python-version }}
-      - run: pip install --editable .
+      - if: matrix.python-version == '3.12'  # Before 2to3 was removed.
+        run: pip install --editable .
       - run: pip install pypiwin32