[Fix #1134] Update special:monitor help text.
[Fix #1134] Update special:monitor help text.

mozmar/snippets-service,glogiotatidis/snippets-service,mozmar/snippets-service,mozmar/snippets-service,mozmar/snippets-service,glogiotatidis/snippets-service,glogiotatidis/snippets-service,glogiotatidis/snippets-service