Bump actions/checkout from 5 to 6 (#2778)

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/api-docs.yml

@@ -19,7 +19,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Checkout
-        uses: actions/checkout@v5
+        uses: actions/checkout@v6
       - name: Setup Node
         uses: actions/setup-node@v6
         with:

.github/workflows/ci.yml

@@ -18,7 +18,7 @@ jobs:
         os: [ubuntu-latest, windows-latest]
         node-version: ["22.x", "20.x"]
     steps:
-      - uses: actions/checkout@v5
+      - uses: actions/checkout@v6
       - uses: actions/setup-node@v6
         with:
           node-version: ${{ matrix.node-version }}
@@ -41,7 +41,7 @@ jobs:
     needs: [unit-tests]
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v5
+      - uses: actions/checkout@v6
         with:
           # Sonar analysis needs the full history for features like automatic assignment of bugs. If the following step
           # is not included the project will show a warning about incomplete information.

.github/workflows/codeql-analysis.yml

@@ -29,7 +29,7 @@ jobs:
 
     steps:
       - name: Checkout repository
-        uses: actions/checkout@v5
+        uses: actions/checkout@v6
         with:
           # We must fetch at least the immediate parents so that if this is
           # a pull request then we can checkout the head.

.github/workflows/e2e-browser.yml

@@ -26,7 +26,7 @@ jobs:
             os: ubuntu-latest
 
     steps:
-      - uses: actions/checkout@v5
+      - uses: actions/checkout@v6
       - uses: actions/setup-node@v6
         with:
           node-version-file: ".nvmrc"

.github/workflows/e2e-node.yml

@@ -23,7 +23,7 @@ jobs:
         environment-name: ["ESS PodSpaces", "ESS Release-2-3", "ESS Next"]
         experimental: [false]
     steps:
-      - uses: actions/checkout@v5
+      - uses: actions/checkout@v6
       - uses: actions/setup-node@v6
         with:
           node-version: ${{ matrix.node-version }}

.github/workflows/release.yml

@@ -16,7 +16,7 @@ jobs:
   publish-npm:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v5
+      - uses: actions/checkout@v6
       - name: Prepare for publication to npm
         uses: actions/setup-node@v6
         with: