ci: bump actions/checkout from 6 to 7 in the ci group

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


Updates `actions/checkout` from 6 to 7
- [Release notes](https://github.com/actions/checkout/releases)
- [Changelog](https://github.com/actions/checkout/blob/main/CHANGELOG.md)
- [Commits](actions/checkout@v6...v7)

---
updated-dependencies:
- dependency-name: actions/checkout
  dependency-version: '7'
  dependency-type: direct:production
  update-type: version-update:semver-major
  dependency-group: ci
...

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

Author: dependabot[bot]

.github/workflows/build.yml

@@ -18,7 +18,7 @@ jobs:
     runs-on: ${{matrix.os}}
     steps:
       - name: Checkout Repository
-        uses: actions/checkout@v6
+        uses: actions/checkout@v7
 
       - name: Set up MSVC [Windows]
         if: matrix.os == 'windows-latest'

.github/workflows/docs.yml

@@ -10,7 +10,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Checkout Repository
-        uses: actions/checkout@v6
+        uses: actions/checkout@v7
 
       - name: Install Doxygen
         uses: ssciwr/doxygen-install@v2

.github/workflows/release.yml

@@ -23,7 +23,7 @@ jobs:
         os: [ubuntu-latest, windows-latest, macos-latest]
     steps:
       - name: Checkout Repository
-        uses: actions/checkout@v6
+        uses: actions/checkout@v7
 
       - name: Set up MSVC [Windows]
         if: matrix.os == 'windows-latest'
@@ -73,7 +73,7 @@ jobs:
       id-token: write
     steps:
       - name: Checkout Repository
-        uses: actions/checkout@v6
+        uses: actions/checkout@v7
 
       - name: Setup .NET Core
         uses: actions/setup-dotnet@v5
@@ -129,7 +129,7 @@ jobs:
         working-directory: '${{github.workspace}}/lang/python'
     steps:
       - name: Checkout Repository
-        uses: actions/checkout@v6
+        uses: actions/checkout@v7
 
       - name: Configure CMake
         working-directory: '${{github.workspace}}'
@@ -161,7 +161,7 @@ jobs:
         os: [ubuntu-latest, windows-latest]
     steps:
       - name: Checkout Repository
-        uses: actions/checkout@v6
+        uses: actions/checkout@v7
 
       - name: Setup Python
         uses: actions/setup-python@v6