Use release version of Python 3.10 (#6116)

Author: srittau

.github/workflows/stubtest-unused-allowlist.yml

@@ -16,7 +16,7 @@ jobs:
     strategy:
       matrix:
         os: ["ubuntu-latest", "windows-latest", "macos-latest"]
-        python-version: [3.6, 3.7, 3.8, 3.9, '3.10.0-beta.1']
+        python-version: ["3.6", "3.7", "3.8", "3.9", "3.10"]
       fail-fast: false
 
     steps:

.github/workflows/tests.yml

@@ -113,7 +113,7 @@ jobs:
       matrix:
         os: ["ubuntu-latest", "windows-latest", "macos-latest"]
         # Python 3.9.7 is required due to changes to ForwardRef.
-        python-version: ["3.6", "3.7", "3.8", "3.9.7", "3.10.0-rc.2"]
+        python-version: ["3.6", "3.7", "3.8", "3.9.7", "3.10"]
       fail-fast: false
 
     steps: