CI(GHActions): Exclude Python 2.7 on Windows

Mini-conda has problems with this combination.

Author: phdru

.github/workflows/test-publish.yaml

@@ -26,6 +26,8 @@ jobs:
           python-version: "3.7"
         - os: macos-latest
           python-version: "=3.9[build=*_pypy]"
+        - os: windows-latest
+          python-version: "2.7"
         include:
         - os: ubuntu-latest
           os-name: Linux