use var for region

.github/workflows/deploy.yml

@@ -28,14 +28,14 @@ jobs:
       - name: Set env vars from AWS params
         uses: cmsgov/ab2d-bcda-dpc-platform/actions/aws-params-env-action@main
         env:
-          AWS_REGION: us-east-1
+          AWS_REGION: ${{ vars.AWS_REGION }}
         with:
           params: |
             SONAR_HOST_URL=/sonarqube/url
             SONAR_TOKEN=/sonarqube/token
       - uses: aws-actions/configure-aws-credentials@v4
         with:
-          aws-region: us-east-1
+          aws-region: ${{ vars.AWS_REGION }}
           role-to-assume: arn:aws:iam::${{ secrets.ACCOUNT_ID }}:role/delegatedadmin/developer/dpc-dev-github-actions
       - name: Run quality gate scan
         if: ${{ startsWith(github.ref, 'refs/tags/') }}