remove link to 10gen repo in pr review template (#22)

Author: biniona-mongodb

.github/pull_request_template.md

@@ -1,6 +1,6 @@
 # Pull Request Info
 
-[PR Reviewing Guidelines](https://github.com/10gen/docs-kafka-connector/blob/master/REVIEWING.md)
+[PR Reviewing Guidelines](https://github.com/mongodb/docs-kafka-connector/blob/master/REVIEWING.md)
 
 JIRA - <https://jira.mongodb.org/browse/DOCSP-NNNNN>
 Staging - <https://docs-mongodbcom-staging.corp.mongodb.com/drivers/docsworker-xlarge/NNNNN/>