feat(github-action)!: Update actions/checkout action to v4.0.0

Author: renovate[bot]

.github/workflows/link-check.yaml

@@ -12,7 +12,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Checkout
-        uses: actions/checkout@f43a0e5ff2bd294095638e18286ca9a3d1956744 # v3.6.0
+        uses: actions/checkout@3df4ab11eba7bda6032a0b82a6bb43b11571feac # v4.0.0
 
       - name: Link Checker
         uses: lycheeverse/lychee-action@ec3ed119d4f44ad2673a7232460dc7dff59d2421 # v1.8.0

.github/workflows/meta-sync-labels.yaml

@@ -13,7 +13,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Checkout
-        uses: actions/checkout@f43a0e5ff2bd294095638e18286ca9a3d1956744 # v3.6.0
+        uses: actions/checkout@3df4ab11eba7bda6032a0b82a6bb43b11571feac # v4.0.0
 
       - name: Sync Labels
         uses: EndBug/label-sync@da00f2c11fdb78e4fae44adac2fdd713778ea3e8 # renovate: tag=v2.3.2