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

Author: renovate[bot]

.github/workflows/ci.yml

@@ -16,7 +16,7 @@ jobs:
     runs-on: "ubuntu-24.04"
 
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v7
 
       - uses: dtolnay/rust-toolchain@stable
         with:

.github/workflows/release.yml

@@ -40,7 +40,7 @@ jobs:
             }
 
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v7
         with:
           fetch-depth: 1
 
@@ -78,7 +78,7 @@ jobs:
     runs-on: ubuntu-24.04
     needs: release
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v7
 
       - name: Cargo publish
         run: |