chore(deps): update actions/checkout action to v6

| datasource  | package          | from   | to     |
| ----------- | ---------------- | ------ | ------ |
| github-tags | actions/checkout | v4     | v6     |
| github-tags | actions/checkout | v4.2.2 | v6.0.1 |


Signed-off-by: renovate-sh-app[bot] <219655108+renovate-sh-app[bot]@users.noreply.github.com>

Author: renovate-sh-app[bot]

.github/workflows/build-website.yml

@@ -15,7 +15,7 @@ jobs:
   build-website:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683 # v4.2.2
+      - uses: actions/checkout@8e8c483db84b4bee98b60c0593521ed34d9990e8 # v6.0.1
         with:
           persist-credentials: false
 

.github/workflows/extension-registry-changed.yml

@@ -34,7 +34,7 @@ jobs:
       - name: Checkout
         with:
           persist-credentials: false
-        uses: actions/checkout@v4
+        uses: actions/checkout@8e8c483db84b4bee98b60c0593521ed34d9990e8 # v6
 
       - name: Generate Files
         run: ${{ github.workspace }}/scripts/extension-registry-changed

.github/workflows/publish-technical-documentation-k6-studio.yml

@@ -15,7 +15,7 @@ jobs:
       id-token: write
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@8e8c483db84b4bee98b60c0593521ed34d9990e8 # v6
         with:
           persist-credentials: false
       - uses: grafana/writers-toolkit/publish-technical-documentation@publish-technical-documentation/v1

.github/workflows/publish-technical-documentation-k6.yml

@@ -15,7 +15,7 @@ jobs:
       id-token: write
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@8e8c483db84b4bee98b60c0593521ed34d9990e8 # v6
         with:
           persist-credentials: false
       - uses: grafana/writers-toolkit/publish-technical-documentation@publish-technical-documentation/v1

.github/workflows/run-code-blocks.yml

@@ -15,7 +15,7 @@ jobs:
   run-code-blocks:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@8e8c483db84b4bee98b60c0593521ed34d9990e8 # v6
         with:
           persist-credentials: false
       - name: Get Changed files

.github/workflows/update-make-docs.yml

@@ -12,7 +12,7 @@ jobs:
     if: github.repository == 'grafana/k6-docs'
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@8e8c483db84b4bee98b60c0593521ed34d9990e8 # v6
         with:
           persist-credentials: false
       - uses: grafana/writers-toolkit/update-make-docs@update-make-docs/v1