Bump actions/checkout from 5 to 6

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>

Author: dependabot[bot]

.github/workflows/cd.yml

@@ -13,7 +13,7 @@ jobs:
   build:
     runs-on: windows-latest
     steps:
-    - uses: actions/checkout@v5
+    - uses: actions/checkout@v6
     - name: Setup .NET SDK
       uses: actions/setup-dotnet@v5
       with:

.github/workflows/ci.yml

@@ -13,7 +13,7 @@ jobs:
   build:
     runs-on: windows-latest
     steps:
-    - uses: actions/checkout@v5
+    - uses: actions/checkout@v6
     - name: Setup .NET
       uses: actions/setup-dotnet@v5
       with:

.github/workflows/e2e.yml

@@ -14,7 +14,7 @@ jobs:
   e2e:
     runs-on: windows-latest
     steps:
-    - uses: actions/checkout@v5
+    - uses: actions/checkout@v6
 
     # - uses: actions/setup-node@v3
     # - name: Install playwright browsers