🌱 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] <[email protected]>

Author: dependabot[bot]

.github/workflows/apidiff.yml

@@ -16,7 +16,7 @@ jobs:
     if: (github.event_name == 'pull_request' && github.event.pull_request.head.repo.full_name != github.repository)
     steps:
       - name: Clone the code
-        uses: actions/checkout@v5
+        uses: actions/checkout@v6
         with:
           fetch-depth: 0
       - name: Setup Go

.github/workflows/codeql.yml

@@ -20,7 +20,7 @@ jobs:
 
     steps:
       - name: Checkout repository
-        uses: actions/checkout@v5
+        uses: actions/checkout@v6
 
       - name: Setup Go
         uses: actions/setup-go@v6

.github/workflows/coverage.yml

@@ -12,7 +12,7 @@ jobs:
     if: (github.event_name == 'push' || github.event.pull_request.head.repo.full_name != github.repository)
     steps:
       - name: Checkout
-        uses: actions/checkout@v5
+        uses: actions/checkout@v6
 
       - name: Setup Go
         uses: actions/setup-go@v6

.github/workflows/cross-platform-tests.yml

@@ -22,7 +22,7 @@ jobs:
     if: (github.event_name == 'push' || github.event.pull_request.head.repo.full_name != github.repository)
     steps:
       - name: Clone the code
-        uses: actions/checkout@v5
+        uses: actions/checkout@v6
       - name: Setup Go
         uses: actions/setup-go@v6
         with:

.github/workflows/external-plugin.yml

@@ -19,7 +19,7 @@ jobs:
     if: github.event_name == 'push' || github.event.pull_request.head.repo.full_name != github.repository
     steps:
       - name: Checkout repository
-        uses: actions/checkout@v5
+        uses: actions/checkout@v6
 
       - name: Setup Go
         uses: actions/setup-go@v6

.github/workflows/legacy-webhook-path.yml

@@ -22,7 +22,7 @@ jobs:
     if: github.event_name == 'push' || github.event.pull_request.head.repo.full_name != github.repository
     steps:
       - name: Clone the code
-        uses: actions/checkout@v5
+        uses: actions/checkout@v6
       - name: Setup Go
         uses: actions/setup-go@v6
         with:

.github/workflows/lint-sample.yml

@@ -29,7 +29,7 @@ jobs:
     if: (github.event_name == 'push' || github.event.pull_request.head.repo.full_name != github.repository)
     steps:
       - name: Clone the code
-        uses: actions/checkout@v5
+        uses: actions/checkout@v6
       - name: Setup Go
         uses: actions/setup-go@v6
         with:

.github/workflows/lint.yml

@@ -16,7 +16,7 @@ jobs:
     if: (github.event_name == 'push' || github.event.pull_request.head.repo.full_name != github.repository)
     steps:
       - name: Clone the code
-        uses: actions/checkout@v5
+        uses: actions/checkout@v6
       - name: Setup Go
         uses: actions/setup-go@v6
         with:
@@ -31,13 +31,13 @@ jobs:
   yamllint:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v5
+      - uses: actions/checkout@v6
       - name: Run yamllint make target
         run: make yamllint
 
   license:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v5
+      - uses: actions/checkout@v6
       - name: Run license check
         run: make test-license

.github/workflows/release-version-ci.yml

@@ -16,7 +16,7 @@ jobs:
 
     steps:
       - name: Checkout code
-        uses: actions/checkout@v5
+        uses: actions/checkout@v6
         with:
           fetch-depth: 0
 

.github/workflows/release.yml

@@ -13,7 +13,7 @@ jobs:
 
     steps:
       - name: Checkout
-        uses: actions/checkout@v5
+        uses: actions/checkout@v6
         with:
           fetch-depth: 0
       - name: Fetch all tags