fix typos (#2617)

docs/monitoring.md

@@ -34,9 +34,9 @@ monitoring from inside the cluster as well as a complementary near-term goal.
 * At the moment of writing, the change feed does not log record deletions. It logs
   only changes. Deallocated clusters are deleted from the monitoring list only if
   they were seen in the `DeletingProvisioningState` by the monitor.
-  The monitor reads the change feed every 10 seconds, so we should except exclude
-  cases when `OpenShiftClusterDocuments` have the `DeletingProvisioningState` less
-  than 10 seconds.
+  The monitor reads the change feed every 10 seconds, so we should avoid
+  cases when `OpenShiftClusterDocuments` have the `DeletingProvisioningState` for 
+  less than 10 seconds.
 * Each monitor aims to check each cluster it "owns" every 5 minutes; it walks
   the local database map and distributes checking over lots of local goroutine
   workers.