fixed grammer

Author: ericallam

.server-changes/fix-blocking-waitpoint-race-condition.md

@@ -3,4 +3,4 @@ area: webapp
 type: fix
 ---
 
-Fix a race condition in the waitpoint system where a run could be blocked by a completed waitpoint but never be resumed because of an PostgreSQL MVCC issue. This was most likely to occur when creating a waitpoint via `wait.forToken()` at the exact same moment as completing the token with `wait.completeToken()`. Other types of waitpoints (timed, child runs) were not affected.
+Fix a race condition in the waitpoint system where a run could be blocked by a completed waitpoint but never be resumed because of a PostgreSQL MVCC issue. This was most likely to occur when creating a waitpoint via `wait.forToken()` at the same moment as completing the token with `wait.completeToken()`. Other types of waitpoints (timed, child runs) were not affected.