Stop gh actions from parsing "3.10" is a number

.github/workflows/python-publish.yml

@@ -9,8 +9,8 @@ jobs:
     runs-on: ubuntu-latest
     strategy:
       matrix:
-        python-version: [ 3.8, 3.9, 3.10 ]
-        click-version: [ click~=7.0, click~=8.0 ]
+        python-version: [ "3.8", "3.9", "3.10" ]
+        click-version: [ "click~=7.0", "click~=8.0" ]
 
     steps:
       - uses: actions/checkout@v3