Fix CI/CD because of GitHub action regression.

Author: jakeichikawasalesforce

.github/workflows/pull_request.yml

@@ -9,7 +9,9 @@ jobs:
 
     strategy:
       matrix:
-        python-version: [3.7, 3.8, 3.9]
+        # TODO: Add 3.7 to python-versions after GitHub action regression is resolved.
+        # https://github.com/actions/setup-python/issues/682
+        python-version: [3.8, 3.9]
         os: [ubuntu-latest, windows-latest, macos-latest]
 
     steps:

.github/workflows/push.yml

@@ -9,7 +9,9 @@ jobs:
 
     strategy:
       matrix:
-        python-version: [3.7, 3.8, 3.9]
+        # TODO: Add 3.7 to python-versions after GitHub action regression is resolved.
+        # https://github.com/actions/setup-python/issues/682
+        python-version: [3.8, 3.9]
         os: [ubuntu-latest, windows-latest, macos-latest]
 
     steps: