chore(deps): update actions/cache action to v6

Author: renovate[bot]

action.yaml

@@ -44,7 +44,7 @@ runs:
         fetch-depth: 1
 
     - name: Aqua Cache
-      uses: actions/cache@27d5ce7f107fe9357f9df03efb73ab90386fccae # v5.0.5
+      uses: actions/cache@55cc8345863c7cc4c66a329aec7e433d2d1c52a9 # v6.1.0
       if: ${{ !github.event.act }}
       with:
         path: ~/.local/share/aquaproj-aqua