fix typo

Author: Jeff Whitaker

.github/workflows/build-wheels-macosx.yml

@@ -24,7 +24,7 @@ jobs:
       fail-fast: false
 
       matrix:
-        python-version: [ "3.6" "3.7" "3.8", "3.9","3.10" ]
+        python-version: [ "3.6", "3.7", "3.8", "3.9","3.10" ]
         os: [macos-latest]
         platform: [x86_64]
     env: