fg: fixed verb tense

pages/common/fg.md

@@ -2,10 +2,10 @@
 
 > Run jobs in foreground.
 
-- Brings most recently suspended background job to foreground:
+- Bring most recently suspended background job to foreground:
 
 `fg`
 
-- Brings a specific job to foreground:
+- Bring a specific job to foreground:
 
 `fg {{job_id}}`