chore(deps): update actions/checkout action to v6

Signed-off-by: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com>

Author: renovate[bot]

.github/workflows/actionlint.yml

@@ -15,7 +15,7 @@ jobs:
     runs-on: ubuntu-latest
 
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v6
 
       - name: Download actionlint
         id: get_actionlint

.github/workflows/audit.yml

@@ -24,7 +24,7 @@ jobs:
     runs-on: windows-latest
 
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v6
 
       - uses: ./.github/actions/cargo-cache
 

.github/workflows/build.yml

@@ -24,7 +24,7 @@ jobs:
     runs-on: windows-latest
 
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v6
 
       - uses: ./.github/actions/cargo-cache
 

.github/workflows/clippy.yml

@@ -24,7 +24,7 @@ jobs:
     runs-on: windows-latest
 
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v6
 
       - uses: ./.github/actions/cargo-cache
 

.github/workflows/format.yml

@@ -24,7 +24,7 @@ jobs:
     runs-on: ubuntu-latest
 
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v6
 
       - name: Format
         run: cargo fmt -- --check

.github/workflows/release.yml

@@ -20,7 +20,7 @@ jobs:
     runs-on: windows-latest
     needs: ["get-release-version"]
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v6
 
       - uses: ./.github/actions/cargo-cache