Merge branch 'doc/BDO-push-rules-edit' into 'master'

Change example for push rules to match comments.

See merge request gitlab-org/gitlab-ee!3508

doc/push_rules/push_rules.md

@@ -136,8 +136,8 @@ id_ecdsa
 #####################
 # Any file with .pem or .key extensions
 #####################
-secret.pem
-private.key
+*.pem
+*.key
 
 #####################
 # Any file ending with _history or .history extension