Update actions/cache action to v6

Author: renovate[bot]

.github/workflows/ci.yml

@@ -6,7 +6,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - uses: actions/checkout@v7
-      - uses: actions/cache@v5
+      - uses: actions/cache@v6
         with:
           path: '**/node_modules'
           key: ${{ runner.os }}-lint-modules-${{ hashFiles('**/yarn.lock') }}
@@ -34,7 +34,7 @@ jobs:
         run: git config --global core.autocrlf input
       - name: Check out repository
         uses: actions/checkout@v7
-      - uses: actions/cache@v5
+      - uses: actions/cache@v6
         with:
           path: '**/node_modules'
           key: ${{ runner.os }}-test-modules-${{ hashFiles('**/yarn.lock') }}