dependencies: bump actions/checkout from 3 to 6

Bumps [actions/checkout](https://github.com/actions/checkout) from 3 to 6.
- [Release notes](https://github.com/actions/checkout/releases)
- [Changelog](https://github.com/actions/checkout/blob/main/CHANGELOG.md)
- [Commits](actions/checkout@v3...v6)

---
updated-dependencies:
- dependency-name: actions/checkout
  dependency-version: '6'
  dependency-type: direct:production
  update-type: version-update:semver-major
...

Signed-off-by: dependabot[bot] <support@github.com>

Author: dependabot[bot]

.github/workflows/labeler.yml

@@ -23,7 +23,7 @@ jobs:
     name: Labeler
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v6
 
       - uses: micnncim/action-label-syncer@v1.3.0
         env:

.github/workflows/line-lint.yml

@@ -16,7 +16,7 @@ jobs:
 
     steps:
       - name: Checkout
-        uses: actions/checkout@v3
+        uses: actions/checkout@v6
 
       - name: Ascertaining all files end with a newline
         uses: fernandrone/linelint@master

.github/workflows/pr-title.yml

@@ -21,7 +21,7 @@ jobs:
 
     steps:
       - name: Checkout
-        uses: actions/checkout@v3
+        uses: actions/checkout@v6
 
       - name: Checking if all files end with a newline
         uses: fernandrone/linelint@master

.github/workflows/readme-generator.yml

@@ -16,7 +16,7 @@ jobs:
   Generating:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v6
         with:
           ref: ${{ github.event.pull_request.head.ref }}
 

.github/workflows/super-linter.yml

@@ -19,7 +19,7 @@ jobs:
 
     steps:
       - name: Checkout
-        uses: actions/checkout@v3
+        uses: actions/checkout@v6
         with:
           fetch-depth: 0
 

.github/workflows/tflint.yml

@@ -22,7 +22,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Checkout
-        uses: actions/checkout@v3
+        uses: actions/checkout@v6
 
       - name: Setup Terraform
         uses: hashicorp/setup-terraform@v2.0.3

.github/workflows/tfsec.yml

@@ -23,7 +23,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Checkout
-        uses: actions/checkout@v3
+        uses: actions/checkout@v6
 
       - name: Setup Terraform
         uses: hashicorp/setup-terraform@v2.0.3

.github/workflows/vulnerability-scaner.yml

@@ -10,7 +10,7 @@ jobs:
     runs-on: ubuntu-latest
     name: Vulnerability Scaner
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v6
 
       - name: Vulnerability Scaner
         id: run_horusec