Update PULL_REQUEST_TEMPLATE.md (#42158)

Author: maririos

.github/PULL_REQUEST_TEMPLATE.md

@@ -2,7 +2,7 @@
 
 Please add an informative description that covers that changes made by the pull request and link all relevant issues.
 
-If an SDK is being regenerated based on a new swagger spec, a link to the pull request containing these swagger spec changes has been included above.
+If an SDK is being regenerated based on a new API spec, a link to the pull request containing these API spec changes should be included above.
 
 # All SDK Contribution checklist:
 - [ ] **The pull request does not introduce [breaking changes]**