chore(build): another try to disable old python versions on macos-latest

Author: d-biehl

.github/workflows/build-test-package-publish.yml

@@ -34,7 +34,9 @@ jobs:
         robot-version: ["rf41", "rf50", "rf60", "rf61", "rf70"]
         exclude:
           - os: macos-latest
-            python-version: ["3.8", "3.9"]
+            python-version: "3.8"
+          - os: macos-latest
+            python-version: "3.9"
 
     steps:
       - uses: actions/checkout@v4