[api] Use "exceeded" to match GitHub API terminology

commands/api.go

@@ -321,7 +321,7 @@ func pauseUntil(timestamp int) {
 	rollover := time.Unix(int64(timestamp)+1, 0)
 	duration := time.Until(rollover)
 	if duration > 0 {
-		ui.Errorf("API rate limit reached; pausing until %v ...\n", rollover)
+		ui.Errorf("API rate limit exceeded; pausing until %v ...\n", rollover)
 		time.Sleep(duration)
 	}
 }

features/api.feature

@@ -436,7 +436,7 @@ Feature: hub api
       }
       """
     When I successfully run `hub api --rate-limit --paginate hello`
-    Then the stderr should contain "API rate limit reached; pausing until "
+    Then the stderr should contain "API rate limit exceeded; pausing until "
 
   Scenario: Honor rate limit for 403s
     Given the GitHub API server:
@@ -453,4 +453,4 @@ Feature: hub api
       }
       """
     When I successfully run `hub api --rate-limit hello`
-    Then the stderr should contain "API rate limit reached; pausing until "
+    Then the stderr should contain "API rate limit exceeded; pausing until "