Bump actions/checkout from 4 to 5

Bumps [actions/checkout](https://github.com/actions/checkout) from 4 to 5.
- [Release notes](https://github.com/actions/checkout/releases)
- [Changelog](https://github.com/actions/checkout/blob/main/CHANGELOG.md)
- [Commits](actions/checkout@v4...v5)

---
updated-dependencies:
- dependency-name: actions/checkout
  dependency-version: '5'
  dependency-type: direct:production
  update-type: version-update:semver-major
...

Signed-off-by: dependabot[bot] <[email protected]>

Author: dependabot[bot]

.github/workflows/integ.yml

@@ -15,7 +15,7 @@ jobs:
     name: Java 17 MacOs
 
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v5
       - uses: gradle/wrapper-validation-action@v3
 
       - name: Set up JDK 17

.github/workflows/update-smithy-gradle-plugin-version.yml

@@ -14,7 +14,7 @@ jobs:
   get-version:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v5
 
       - name: Fetch latest smithy-gradle-plugin version
         id: fetch-latest

.github/workflows/update-smithy-version.yml

@@ -13,7 +13,7 @@ jobs:
   get-version:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v5
 
       - name: Fetch latest smithy version
         id: fetch-latest