Bump actions/checkout from 5 to 6 (#2920)

Bumps [actions/checkout](https://github.com/actions/checkout) from 5 to 6.
- [Release notes](https://github.com/actions/checkout/releases)
- [Changelog](https://github.com/actions/checkout/blob/main/CHANGELOG.md)
- [Commits](actions/checkout@v5...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>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Author: dependabot[bot]

.github/workflows/atlas-ci.yml

@@ -33,7 +33,7 @@ jobs:
 
     steps:
       - name: "Checkout"
-        uses: "actions/checkout@v5"
+        uses: "actions/checkout@v6"
         with:
           fetch-depth: 2
 

.github/workflows/continuous-integration.yml

@@ -130,7 +130,7 @@ jobs:
 
     steps:
       - name: "Checkout"
-        uses: "actions/checkout@v5"
+        uses: "actions/checkout@v6"
         with:
           fetch-depth: 2
 

.github/workflows/performance.yml

@@ -25,7 +25,7 @@ jobs:
 
     steps:
       - name: "Checkout"
-        uses: "actions/checkout@v5"
+        uses: "actions/checkout@v6"
 
       - name: Setup cache environment
         id: extcache

.github/workflows/static-analysis.yml

@@ -20,7 +20,7 @@ jobs:
 
     steps:
       - name: "Checkout code"
-        uses: "actions/checkout@v5"
+        uses: "actions/checkout@v6"
 
       - name: Setup cache environment
         id: extcache