reorganizing startup steps

Author: ianbotsf

.github/workflows/update-release-branch.yml

@@ -30,18 +30,18 @@ jobs:
       - name: Set start timestamp
         id: start
         run: printf 'timestamp=%(%s)T\n' >> "$GITHUB_OUTPUT"
-      - uses: actions/checkout@v4
-        with:
-          ref: 'main'
-          fetch-depth: 0
-          token: ${{ secrets.CI_USER_PAT }}
       - name: Configure AWS Credentials
         uses: aws-actions/configure-aws-credentials@v4
         with:
           role-to-assume: ${{ secrets.CI_AWS_ROLE_ARN }}
           aws-region: us-west-2
       - name: Setup kat
         uses: awslabs/aws-kotlin-repo-tools/.github/actions/setup-kat@main
+      - uses: actions/checkout@v4
+        with:
+          ref: 'main'
+          fetch-depth: 0
+          token: ${{ secrets.CI_USER_PAT }}
       - name: Configure Git
         shell: bash
         run: |