Add missing end quote of a string in the example code of FT_Trace_Set_Level
diff --git a/include/freetype/ftlogging.h b/include/freetype/ftlogging.h
index 2246dc8..53b8b89 100644
--- a/include/freetype/ftlogging.h
+++ b/include/freetype/ftlogging.h
@@ -62,7 +62,7 @@
    *   component.
    *
    *   ```
-   *   FT_Trace_Set_Level( "any:7 memory:0 );
+   *   FT_Trace_Set_Level( "any:7 memory:0" );
    *   ```
    *
    * @note: