Update c6059.md

small typo

Author: TylerMSFT

docs/code-quality/c6059.md

@@ -83,7 +83,7 @@ void f( )
 
 This analysis detects when the target buffer size is passed unmodified into the length parameter of the string manipulation function. This warning isn't given if some other value is passed as the length parameter, even if that value is incorrect.
 
-Consider the following code, generates warning C6059:
+Consider the following code which generates warning C6059:
 
 ```cpp
 #include <string.h>