ci: bump actions/checkout to v6 and setup-tflint to v6

Author: jfreed-dev

.github/workflows/docs.yml

@@ -14,7 +14,7 @@ jobs:
 
     steps:
       - name: Checkout
-        uses: actions/checkout@v4
+        uses: actions/checkout@v6
         with:
           ref: ${{ github.event.pull_request.head.ref }}
 

.github/workflows/validate.yml

@@ -28,7 +28,7 @@ jobs:
 
     steps:
       - name: Checkout
-        uses: actions/checkout@v4
+        uses: actions/checkout@v6
 
       - name: Setup Terraform
         uses: hashicorp/setup-terraform@v3
@@ -46,7 +46,7 @@ jobs:
         working-directory: ${{ matrix.module }}
 
       - name: Setup TFLint
-        uses: terraform-linters/setup-tflint@v4
+        uses: terraform-linters/setup-tflint@v6
 
       - name: TFLint Init
         run: tflint --init --config "$GITHUB_WORKSPACE/.tflint.hcl"
@@ -62,7 +62,7 @@ jobs:
 
     steps:
       - name: Checkout
-        uses: actions/checkout@v4
+        uses: actions/checkout@v6
 
       - name: Run Trivy security scanner
         uses: aquasecurity/trivy-action@master