CI: Two more allow-prereleases: true

Author: EwoutH

.github/workflows/test.yaml

@@ -482,6 +482,7 @@ jobs:
         uses: actions/setup-python@v5
         with:
           python-version: ${{ matrix.python-version }}
+          allow-prereleases: true
           cache: "pip"
 
       - uses: actions/download-artifact@v4
@@ -710,6 +711,7 @@ jobs:
         uses: actions/setup-python@v5
         with:
           python-version: "3.13"
+          allow-prereleases: true
 
       - uses: actions/download-artifact@v4
         with: