Update README.md

Author: namenu

README.md

@@ -60,6 +60,7 @@ jobs:
           aliases: "[:test]"
 
       - uses: marocchino/sticky-pull-request-comment@v2
+        if: ${{ steps.diff.outputs.exit_code != 0 }}
         with:
           header: deps-diff # Creates a collapsed comment with the report
           message: |
@@ -85,4 +86,4 @@ This workflow will comment on your PR as shown below.
 ## Outputs
 
 - `deps_diff` - The name of the outlet where the execution result is output. Use it along with the action's id in your workflow.
-- `exit_code` - 0 if equal or else 1.
+- `exit_code` - 0 if equal or else 1.