chore(deps): update actions/cache digest to 6849a64 (#920)

Co-authored-by: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com>

.github/workflows/docker--ghcr.yml

@@ -36,7 +36,7 @@ jobs:
           password: ${{ secrets.GITHUB_TOKEN }}
 
       - name: Cache Docker layers
-        uses: actions/cache@3624ceb22c1c5a301c8db4169662070a689d9ea8 # v4
+        uses: actions/cache@6849a6489940f00c2f30c0fb92c6274307ccb58a # v4
         with:
           path: /tmp/.buildx-cache
           key: ${{ runner.os }}-buildx-${{ matrix.images }}-${{ github.sha }}