chore(deps): update actions/cache action to v5 (#28)

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

Author: renovate[bot]

.github/workflows/tflint.yaml

@@ -17,7 +17,7 @@ jobs:
       - uses: actions/checkout@v6
         name: Checkout source code
 
-      - uses: actions/cache@v4
+      - uses: actions/cache@v5
         name: Cache plugin dir
         with:
           path: ~/.tflint.d/plugins