Checkout: Update all workflows to use Checkout V4

.github/workflows/lint.yaml

@@ -12,7 +12,7 @@ jobs:
     runs-on: ubuntu-latest
 
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
 
       - uses: actions/setup-python@v4
         with:

.github/workflows/sync-ghes.yaml

@@ -10,7 +10,7 @@ jobs:
       contents: write
     runs-on: ubuntu-latest
     steps:
-    - uses: actions/checkout@v3
+    - uses: actions/checkout@v4
     - run: |
         git fetch --no-tags --prune --depth=1 origin +refs/heads/*:refs/remotes/origin/*
         git config user.email "cschleiden@github.com"

.github/workflows/validate-data.yaml

@@ -10,7 +10,7 @@ jobs:
       contents: read
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
 
       - uses: actions/setup-node@v3
         with: