CI: Bump actions/checkout in the github-actions group across 1 directory

Bumps the github-actions group with 1 update in the / directory: [actions/checkout](https://github.com/actions/checkout).


Updates `actions/checkout` from 6 to 6.0.2
- [Release notes](https://github.com/actions/checkout/releases)
- [Changelog](https://github.com/actions/checkout/blob/main/CHANGELOG.md)
- [Commits](https://github.com/actions/checkout/compare/v6...v6.0.2)

---
updated-dependencies:
- dependency-name: actions/checkout
  dependency-version: 6.0.2
  dependency-type: direct:production
  update-type: version-update:semver-patch
  dependency-group: github-actions
...

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

.github/workflows/ci-linux.yml

@@ -83,7 +83,7 @@ jobs:
 
     steps:
       - name: Checkout repository from GitHub
-        uses: actions/checkout@v6
+        uses: actions/checkout@v6.0.2
 
       - name: Build
         timeout-minutes: 15

.github/workflows/ci-linux_asan.yml

@@ -37,7 +37,7 @@ jobs:
 
     steps:
       - name: Checkout repository from GitHub
-        uses: actions/checkout@v6
+        uses: actions/checkout@v6.0.2
 
       - name: Build
         timeout-minutes: 15

.github/workflows/ci-macos.yml

@@ -32,7 +32,7 @@ jobs:
 
     steps:
       - name: Checkout repository from GitHub
-        uses: actions/checkout@v6
+        uses: actions/checkout@v6.0.2
 
       - name: Install packages
         if: matrix.features == 'huge'

.github/workflows/ci-windows.yml

@@ -128,7 +128,7 @@ jobs:
           release: false
 
       - name: Checkout repository from GitHub
-        uses: actions/checkout@v6
+        uses: actions/checkout@v6.0.2
 
       - name: Create a list of download URLs
         shell: cmd

.github/workflows/codeql-analysis.yml

@@ -44,7 +44,7 @@ jobs:
 
     steps:
     - name: Checkout repository from github
-      uses: actions/checkout@v6
+      uses: actions/checkout@v6.0.2
 
     # Initializes the CodeQL tools for scanning.
     - name: Initialize CodeQL

.github/workflows/coverity.yml

@@ -19,7 +19,7 @@ jobs:
     steps:
       - name: Checkout repository from github
         if: env.TOKEN
-        uses: actions/checkout@v6
+        uses: actions/checkout@v6.0.2
 
       - name: Download Coverity
         if: env.TOKEN

.github/workflows/link-check.yml

@@ -8,7 +8,7 @@ jobs:
   lychee:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v6
+      - uses: actions/checkout@v6.0.2
       - name: Run Lychee
         uses: lycheeverse/lychee-action@v2
         with:

.github/workflows/macvim-buildtest.yaml

@@ -64,7 +64,7 @@ jobs:
     runs-on: ${{ inputs.os }}
     steps:
       - name: Checkout
-        uses: actions/checkout@v6
+        uses: actions/checkout@v6.0.2
 
       - name: Set up legacy build
         if: inputs.legacy