Update actions/checkout action to v7

Author: renovate[bot]

.github/workflows/ci.yaml

@@ -11,7 +11,7 @@ jobs:
   build:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v6
+      - uses: actions/checkout@v7
 
       - uses: Swatinem/rust-cache@v2
 
@@ -24,7 +24,7 @@ jobs:
   test:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v6
+      - uses: actions/checkout@v7
 
       - uses: Swatinem/rust-cache@v2
 
@@ -33,7 +33,7 @@ jobs:
   lint-clippy:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v6
+      - uses: actions/checkout@v7
 
       - uses: Swatinem/rust-cache@v2
 
@@ -42,6 +42,6 @@ jobs:
   lint-fmt:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v6
+      - uses: actions/checkout@v7
 
       - run: cargo fmt --check

.github/workflows/release-on-tag.yaml

@@ -28,7 +28,7 @@ jobs:
       binary_name: md-table-action${{ matrix.file_extension }}
 
     steps:
-      - uses: actions/checkout@v6
+      - uses: actions/checkout@v7
 
       - uses: Swatinem/rust-cache@v2