LibC: Fix a indentation problem in time.cpp

Author: https://github.com/f-eiwu
Commit: 4ba206b7e5
Pull-request: https://github.com/SerenityOS/serenity/pull/1360

Libraries/LibC/time.cpp

@@ -304,7 +304,7 @@ size_t strftime(char* destination, size_t max_size, const char* format, const st
             }
         }
         if (builder.length() > max_size - 1)
-                return 0;
+            return 0;
     }
 
     strcpy(destination, builder.build().characters());