Add update flag

Author: oscarbenjamin

.github/workflows/buildwheel.yml

@@ -22,11 +22,13 @@ jobs:
       - uses: msys2/setup-msys2@v2.30.0
         with:
           msystem: ucrt64
+          update: true
         if: ${{ matrix.os == 'windows-2022' }}
 
       - uses: msys2/setup-msys2@v2.30.0
         with:
           msystem: clangarm64
+          update: true
         if: ${{ matrix.os == 'windows-11-arm' }}
 
         # Install pkgconfig on Windows from choco rather than from msys and