fix import typo which may introduce compilation error

mssun · mssun · commit 46536f4b6be2 · 2017-02-17T20:10:18.000+08:00
diff --git a/ObjectiveGit/GTRepository+References.h b/ObjectiveGit/GTRepository+References.h
@@ -6,7 +6,7 @@
 //  Copyright (c) 2015 GitHub, Inc. All rights reserved.
 //
 
-#import "GTrepository.h"
+#import "GTRepository.h"
 
 NS_ASSUME_NONNULL_BEGIN
 
