typo fix

.github/PULL_REQUEST_TEMPLATE.md

@@ -1,6 +1,6 @@
 Thank you for your contribution!
 
-1. To make sure we include your contribution in the release notes, please make sure to add description entry for your changes in the "unreleased changes" section of the `CHANGELOG.md` file (of the gem correspondingly). For the description entry, please make sure it lives in one line and starts with `Feature` or `Issue` in the correct format.
+1. To make sure we include your contribution in the release notes, please make sure to add description entry for your changes in the "unreleased changes" section of the `CHANGELOG.md` file (per gem correspondingly). For the description entry, please make sure it lives in one line and starts with `Feature` or `Issue` in the correct format.
 
 2. For generated code changes, please checkout below instructions first:
   https://github.com/aws/aws-sdk-ruby/blob/master/CONTRIBUTING.md