upgrade to actions/cache 5

Author: rgl

.github/workflows/lint.yml

@@ -7,7 +7,7 @@ jobs:
     steps:
       - uses: actions/checkout@v6
       - name: Cache the plugins directory
-        uses: actions/cache@v4
+        uses: actions/cache@v5
         with:
           path: ~/.tflint.d/plugins
           key: tflint-${{ hashFiles('.tflint.hcl') }}