feat: Update vcpkg action

Author: nlogozzo

.github/workflows/windows.yml

@@ -42,14 +42,14 @@ jobs:
           move gettext\bin\* C:\Windows\System32
           choco install innosetup
       - name: "Vcpkg"
-        uses: johnwason/vcpkg-action@v6
+        uses: johnwason/vcpkg-action@v7
         id: vcpkg
         with:
           pkgs: libnick
           triplet: ${{ matrix.variant.triplet }}
           revision: 3c81ed09705008f13bf76f39853507bef51f71a1
           token: ${{ github.token }}
-          github-binarycache: true
+          cache-key: ${{ matrix.variant.triplet }}
       - name: "Build (Installer)"
         working-directory: ${{ github.workspace }}/build
         run: |