[ci] Allow Python prerelease versions (#10557)

Author: cclauss

.github/workflows/tests.yaml

@@ -32,7 +32,7 @@ jobs:
       fail-fast: false
       matrix:
         os: [ubuntu-latest]
-        python-version: ["3.10", "3.11", "3.12", "3.13", "3.14-dev"]
+        python-version: ["3.10", "3.11", "3.12", "3.13", "3.14"]
         include:
           - os: macos-latest
             python-version: "3.10"
@@ -51,6 +51,7 @@ jobs:
         uses: actions/setup-python@v6.0.0
         with:
           python-version: ${{ matrix.python-version }}
+          allow-prereleases: true
           check-latest: true
       - name: Generate partial Python venv restore key
         id: generate-python-key
@@ -188,7 +189,7 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        python-version: ["3.10", "3.11", "3.12", "3.13", "3.14-dev"]
+        python-version: ["3.10", "3.11", "3.12", "3.13", "3.14"]
     steps:
       - name: Set temp directory
         run: echo "TEMP=$env:USERPROFILE\AppData\Local\Temp" >> $env:GITHUB_ENV
@@ -202,6 +203,7 @@ jobs:
         with:
           python-version: ${{ matrix.python-version }}
           check-latest: true
+          allow-prereleases: true
       - name: Generate partial Python venv restore key
         id: generate-python-key
         run: >-