PHPLIB-605: Add note about filing docs ticket for compatibility changes

Author: alcaeus

CONTRIBUTING.md

@@ -205,6 +205,7 @@ announced via [@MongoDB](http://twitter.com/mongodb) as well.
 
 ### Update compatibility tables in MongoDB docs
 
-The [compatibility tables](https://docs.mongodb.com/drivers/driver-compatibility-reference#php-driver-compatibility) in
-the MongoDB documentation must be updated to account for new releases. Make sure to update both MongoDB and Language
+For minor releases, create a DOCSP ticket indicating whether there are changes to MongoDB Server or PHP version
+compatibility. The [compatibility tables](https://docs.mongodb.com/drivers/driver-compatibility-reference#php-driver-compatibility)
+in the MongoDB documentation must be updated to account for new releases. Make sure to update both MongoDB and Language
 compatibility tables, as shown in [this pull request](https://github.com/mongodb/docs-ecosystem/pull/642).