chore(deps): Bump actions/checkout from 5 to 6

Bumps [actions/checkout](https://github.com/actions/checkout) from 5 to 6.
- [Release notes](https://github.com/actions/checkout/releases)
- [Changelog](https://github.com/actions/checkout/blob/main/CHANGELOG.md)
- [Commits](actions/checkout@v5...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>

Author: dependabot[bot]

.github/workflows/ci.yml

@@ -8,7 +8,7 @@ jobs:
   build:
     runs-on: ubuntu-latest
     steps:
-    - uses: actions/checkout@v5
+    - uses: actions/checkout@v6
     - uses: sqlc-dev/setup-sqlc@v4
       with:
         sqlc-version: '1.24.0'

.github/workflows/examples.yml

@@ -13,7 +13,7 @@ jobs:
           - dir: "examples/bun-mysql2"
             qs: "mysql"
     steps:
-    - uses: actions/checkout@v5
+    - uses: actions/checkout@v6
     - uses: sqlc-dev/setup-sqlc@v4
       with:
         sqlc-version: '1.24.0'
@@ -42,7 +42,7 @@ jobs:
           - dir: "examples/bun-pg"
             qs: "postgresql"
     steps:
-    - uses: actions/checkout@v5
+    - uses: actions/checkout@v6
     - uses: sqlc-dev/setup-sqlc@v4
       with:
         sqlc-version: '1.24.0'
@@ -72,7 +72,7 @@ jobs:
           - dir: "examples/node-mysql2"
             qs: "mysql"
     steps:
-    - uses: actions/checkout@v5
+    - uses: actions/checkout@v6
     - uses: sqlc-dev/setup-sqlc@v4
       with:
         sqlc-version: '1.24.0'
@@ -101,7 +101,7 @@ jobs:
           - dir: "examples/node-pg"
             qs: "postgresql"
     steps:
-    - uses: actions/checkout@v5
+    - uses: actions/checkout@v6
     - uses: sqlc-dev/setup-sqlc@v4
       with:
         sqlc-version: '1.24.0'

.github/workflows/release.yml

@@ -12,7 +12,7 @@ jobs:
   release:
     runs-on: ubuntu-24.04
     steps:
-      - uses: actions/checkout@v5
+      - uses: actions/checkout@v6
         with:
           fetch-depth: 0
       - name: Build project