Update actions/cache action to v6

Author: renovate[bot]

.github/workflows/build.yml

@@ -74,7 +74,7 @@ jobs:
           sudo apt install -y mono-complete
           mono --version
       - name: Cache Tools
-        uses: actions/cache@0057852bfaa89a56745cba8c7296529d2fc39830 # v4
+        uses: actions/cache@55cc8345863c7cc4c66a329aec7e433d2d1c52a9 # v6
         with:
           path: tools
           key: ${{ runner.os }}-tools-${{ hashFiles('recipe.cake') }}

.github/workflows/codeql-analysis.yml

@@ -48,7 +48,7 @@ jobs:
         mono --version
 
     - name: Cache Tools
-      uses: actions/cache@0057852bfaa89a56745cba8c7296529d2fc39830 # v4
+      uses: actions/cache@55cc8345863c7cc4c66a329aec7e433d2d1c52a9 # v6
       with:
         path: tools
         key: ${{ runner.os }}-tools-${{ hashFiles('recipe.cake') }}