add missing - in bump.yml

Author: kay-kim

.github/workflows/bump.yml

@@ -49,7 +49,7 @@ jobs:
             terraform init
           fi
 
-        name: Update README
+      - name: Update README
         run: |
           docker run --rm --volume "$(pwd):/terraform-docs" quay.io/terraform-docs/terraform-docs:0.19.0  markdown table --output-file README.md --output-mode inject /terraform-docs