Bump actions/checkout from 5 to 6 in /.github/workflows

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/gitsecrets.yml

@@ -7,7 +7,7 @@ jobs:
     name: Git Secrets Scan
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v5
+      - uses: actions/checkout@v6
         with:
           path: src/github.com/aws/amazon-ecs-ami
       - name: Git Secrets Scan Script

.github/workflows/initiaterelease.yml

@@ -21,7 +21,7 @@ jobs:
       GH_TOKEN: ${{ github.token }}
     steps:
     - name: Checkout
-      uses: actions/checkout@v5
+      uses: actions/checkout@v6
     - name: Create Release Branch
       run: |
         date=$(date '+%Y%m%d')
@@ -77,7 +77,7 @@ jobs:
       contents: read
     steps:
     - name: Checkout
-      uses: actions/checkout@v5
+      uses: actions/checkout@v6
     - name: Configure AWS Credentials
       uses: aws-actions/configure-aws-credentials@v5
       with:
@@ -114,7 +114,7 @@ jobs:
       contents: read
     steps:
     - name: Checkout
-      uses: actions/checkout@v5
+      uses: actions/checkout@v6
     - name: Configure AWS Credentials
       uses: aws-actions/configure-aws-credentials@v5
       with:

.github/workflows/manualtrigger.yml

@@ -10,7 +10,7 @@ jobs:
       contents: read
     steps:
     - name: Checkout
-      uses: actions/checkout@v5
+      uses: actions/checkout@v6
     - name: Configure AWS Credentials
       uses: aws-actions/configure-aws-credentials@v5
       with: 

.github/workflows/static.yml

@@ -6,5 +6,5 @@ jobs:
   run:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v5
+      - uses: actions/checkout@v6
       - run: make static-check