chore(deps): bump actions/checkout from 4 to 6

Bumps [actions/checkout](https://github.com/actions/checkout) from 4 to 6.
- [Release notes](https://github.com/actions/checkout/releases)
- [Commits](actions/checkout@v4...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/copilot-setup-steps.yml

@@ -24,7 +24,7 @@ jobs:
     steps:
       # Checkout the repository to install dependencies
       - name: Checkout code
-        uses: actions/checkout@v6.0.2
+        uses: actions/checkout@v6
 
       # Setup Node.js (for TypeScript/JavaScript SDK and tooling)
       - name: Set up Node.js

.github/workflows/docs-validation.yml

@@ -21,7 +21,7 @@ jobs:
     name: "Validate TypeScript"
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v6
 
       - uses: actions/setup-node@v4
         with:
@@ -45,7 +45,7 @@ jobs:
     name: "Validate Python"
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v6
 
       - uses: actions/setup-node@v4
         with:
@@ -77,7 +77,7 @@ jobs:
     name: "Validate Go"
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v6
 
       - uses: actions/setup-node@v4
         with:
@@ -100,7 +100,7 @@ jobs:
     name: "Validate C#"
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v6
 
       - uses: actions/setup-node@v4
         with:

.github/workflows/dotnet-sdk-tests.yml

@@ -38,7 +38,7 @@ jobs:
         shell: bash
         working-directory: ./dotnet
     steps:
-      - uses: actions/checkout@v6.0.2
+      - uses: actions/checkout@v6
       - uses: ./.github/actions/setup-copilot
         id: setup-copilot
       - uses: actions/setup-dotnet@v5

.github/workflows/go-sdk-tests.yml

@@ -38,7 +38,7 @@ jobs:
         shell: bash
         working-directory: ./go
     steps:
-      - uses: actions/checkout@v6.0.2
+      - uses: actions/checkout@v6
       - uses: ./.github/actions/setup-copilot
         id: setup-copilot
       - uses: actions/setup-go@v6

.github/workflows/issue-triage.lock.yml

@@ -40,7 +40,7 @@ jobs:
         shell: bash
         working-directory: ./nodejs
     steps:
-      - uses: actions/checkout@v6.0.2
+      - uses: actions/checkout@v6
       - uses: actions/setup-node@v6
         with:
           cache: "npm"

.github/workflows/nodejs-sdk-tests.yml

@@ -40,7 +40,7 @@ jobs:
       run:
         working-directory: ./nodejs
     steps:
-      - uses: actions/checkout@v6.0.2
+      - uses: actions/checkout@v6
       - uses: actions/setup-node@v6
         with:
           node-version: "22.x"
@@ -85,7 +85,7 @@ jobs:
       run:
         working-directory: ./nodejs
     steps:
-      - uses: actions/checkout@v6.0.2
+      - uses: actions/checkout@v6
       - uses: actions/setup-node@v6
         with:
           node-version: "22.x"
@@ -116,7 +116,7 @@ jobs:
       run:
         working-directory: ./dotnet
     steps:
-      - uses: actions/checkout@v6.0.2
+      - uses: actions/checkout@v6
       - uses: actions/setup-dotnet@v5
         with:
           dotnet-version: "8.0.x"
@@ -149,7 +149,7 @@ jobs:
       run:
         working-directory: ./python
     steps:
-      - uses: actions/checkout@v6.0.2
+      - uses: actions/checkout@v6
       - uses: actions/setup-python@v6
         with:
           python-version: "3.12"
@@ -175,7 +175,7 @@ jobs:
     if: github.ref == 'refs/heads/main'
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v6.0.2
+      - uses: actions/checkout@v6
       - name: Create GitHub Release
         if: github.event.inputs.dist-tag == 'latest'
         run: |

.github/workflows/publish.yml

@@ -41,7 +41,7 @@ jobs:
         shell: bash
         working-directory: ./python
     steps:
-      - uses: actions/checkout@v6.0.2
+      - uses: actions/checkout@v6
       - uses: ./.github/actions/setup-copilot
         id: setup-copilot
       - uses: actions/setup-python@v6