Add cache for windows CI

Author: Dirreke

.github/workflows/openblas-src.yml

@@ -22,7 +22,7 @@ jobs:
       - uses: actions/cache@v4
         with:
           path: ./vcpkg
-          key: vcpkg-openblas
+          key: vcpkg-openblas-${{ matrix.triple }}
       - name: Install vcpkg
         run: |
           git clone https://github.com/Microsoft/vcpkg.git --depth 1