chore(deps): update actions/checkout action to v7

Author: renovate[bot]

.github/workflows/release.yaml

@@ -18,7 +18,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Checkout
-        uses: actions/checkout@v6
+        uses: actions/checkout@v7
 
       - name: Semantic Release
         uses: cycjimmy/semantic-release-action@v6

.github/workflows/sync-vendored-skills.yaml

@@ -20,7 +20,7 @@ jobs:
     outputs:
       matrix: ${{ steps.set.outputs.matrix }}
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v7
 
       - name: Build matrix from manifest
         id: set
@@ -57,7 +57,7 @@ jobs:
       matrix: ${{ fromJson(needs.build-matrix.outputs.matrix) }}
     steps:
       - name: Checkout this repo
-        uses: actions/checkout@v4
+        uses: actions/checkout@v7
 
       - name: Sparse checkout upstream
         run: |