fixed implementation header

Author: Sriya Pratipati

libc/fuzzing/math/f16sqrt_fuzz.cpp

@@ -1,5 +1,4 @@
-//===-- f16sqrt_fuzz.cpp
-//----------------------------------------------------===//
+//===-- f16sqrt_fuzz.cpp --------------------------------------------------===//
 //
 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
 // See https://llvm.org/LICENSE.txt for license information.