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

Author: renovate[bot]

.github/workflows/main.yml

@@ -26,7 +26,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Clone repo
-        uses: actions/checkout@v5
+        uses: actions/checkout@v6
       - name: Check hyperlinks
         uses: gaurav-nelson/github-action-markdown-link-check@v1
 
@@ -35,7 +35,7 @@ jobs:
     name: Build, lint and test
     steps:
       - name: Clone repo
-        uses: actions/checkout@v5
+        uses: actions/checkout@v6
       - name: Install pnpm
         uses: pnpm/action-setup@v4
       - name: Setup Node
@@ -58,7 +58,7 @@ jobs:
     name: E2e tests
     steps:
       - name: Clone repo
-        uses: actions/checkout@v5
+        uses: actions/checkout@v6
       - name: Install pnpm
         uses: pnpm/action-setup@v4
       - name: Setup Node
@@ -106,7 +106,7 @@ jobs:
       id-token: write
     steps:
       - name: Clone repo
-        uses: actions/checkout@v5
+        uses: actions/checkout@v6
         with:
           fetch-depth: 0
       - name: Install pnpm