Apparently quotations are needed...

Author: ctralie

.github/workflows/python-app.yml

@@ -13,7 +13,7 @@ jobs:
   test:
     strategy:
       matrix:
-        python-version: [3.9, 3.10, 3.11, 3.12]
+        python-version: ["3.9", "3.10", "3.11", "3.12"]
         os: ["ubuntu-latest", "macos-latest"]
     runs-on: ${{ matrix.os }}
 
@@ -47,7 +47,7 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        python-version: [3.9, 3.10, 3.11, 3.12]
+        python-version: ["3.9", "3.10", "3.11", "3.12"]
 
     steps:
       - uses: actions/checkout@v2
@@ -72,7 +72,7 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        python-version: [3.9, 3.10, 3.11, 3.12]
+        python-version: ["3.9", "3.10", "3.11", "3.12"]
 
     steps:
       - uses: actions/checkout@v2

.github/workflows/python-publish.yml

@@ -13,7 +13,7 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        python-version: [3.9, 3.10, 3.11, 3.12]
+        python-version: ["3.9", "3.10", "3.11", "3.12"]
 
     runs-on: "ubuntu-latest"
     steps:
@@ -43,7 +43,7 @@ jobs:
       fail-fast: false
       matrix:
         arch: ['x86', 'x64']
-        python-version: [3.9, 3.10, 3.11, 3.12]
+        python-version: ["3.9", "3.10", "3.11", "3.12"]
 
     runs-on: "windows-latest"