build(deps): bump actions/checkout from 4 to 6

Bumps [actions/checkout](https://github.com/actions/checkout) from 4 to 6.
- [Release notes](https://github.com/actions/checkout/releases)
- [Changelog](https://github.com/actions/checkout/blob/main/CHANGELOG.md)
- [Commits](https://github.com/actions/checkout/compare/v4...v6)

---
updated-dependencies:
- dependency-name: actions/checkout
  dependency-version: '6'
  dependency-type: direct:production
  update-type: version-update:semver-major
...

Signed-off-by: dependabot[bot] <support@github.com>

.github/workflows/benchstat.yml

@@ -17,7 +17,7 @@ jobs:
           - 6379:6379
     steps:
       - name: Checkout
-        uses: actions/checkout@v4
+        uses: actions/checkout@v6
       - name: Set up Go
         uses: actions/setup-go@v5
         with:
@@ -40,7 +40,7 @@ jobs:
           - 6379:6379
     steps:
       - name: Checkout
-        uses: actions/checkout@v4
+        uses: actions/checkout@v6
         with:
           ref: master
       - name: Set up Go
@@ -61,7 +61,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Checkout
-        uses: actions/checkout@v4
+        uses: actions/checkout@v6
       - name: Set up Go
         uses: actions/setup-go@v5
         with:

.github/workflows/build.yml

@@ -15,7 +15,7 @@ jobs:
         ports:
           - 6379:6379
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v6
 
       - name: Set up Go
         uses: actions/setup-go@v5
@@ -53,7 +53,7 @@ jobs:
         ports:
           - 6379:6379
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v6
 
       - name: Set up Go
         uses: actions/setup-go@v5
@@ -72,7 +72,7 @@ jobs:
     runs-on: ubuntu-latest
     if: false
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v6
 
       - uses: actions/setup-go@v5
         with: