Update actions/cache digest to 6849a64

Author: renovate[bot]

.github/workflows/build.yml

@@ -47,7 +47,7 @@ jobs:
         run: git fetch --prune --unshallow
 
       - name: Cache Tools
-        uses: actions/cache@0c45773b623bea8c8e75f6c82b208c3cf94ea4f9 # v4
+        uses: actions/cache@6849a6489940f00c2f30c0fb92c6274307ccb58a # v4
         with:
           path: tools
           key: ${{ runner.os }}-tools-${{ hashFiles('recipe.cake', '.config/dotnet-tools.json') }}