Update test matrix.

Author: jg-rp

.github/workflows/tests.yaml

@@ -9,7 +9,12 @@ jobs:
       fail-fast: false
       matrix:
         os: [ubuntu-latest, windows-latest, macos-latest]
-        python-version: ["3.7", "3.8", "3.9", "3.10", "3.11", "3.12.0-rc.3"]
+        python-version: ["3.7", "3.8", "3.9", "3.10", "3.11", "3.12"]
+        exclude:
+          - os: macos-latest
+            python-version: "3.7"
+          - os: windows-latest
+            python-version: "3.7"
     steps:
       - uses: actions/checkout@v3
         with: