CI: Skip 3.10 for Windows/Mac while we wait on numpy builds

Author: effigies

.github/workflows/pre-release.yml

@@ -48,9 +48,9 @@ jobs:
           - os: macos-latest
             architecture: x86
           - os: windows-latest
-            python-version: 3.9
+            python-version: "3.10.0-rc.1"
           - os: macos-latest
-            python-version: 3.9
+            python-version: "3.10.0-rc.1"
 
     env:
       DEPENDS: ${{ matrix.depends }}