fixed f9ef4838 from https://gitee.com/wusongqing/docs/pulls/17675

Update docs against 16737

Signed-off-by: wusongqing<wusongqing@huawei.com>

en/application-dev/napi/drawing-guidelines.md

@@ -189,7 +189,7 @@ The following steps describe how to use the text drawing and display feature of
         OH_Drawing_CreateFontCollection());
     OH_Drawing_TypographyHandlerPushTextStyle(handler, txtStyle);
     // Set the text content.
-    const char* text = "OpenHarmony\n";
+    const char* text = "Hello World\n";
     OH_Drawing_TypographyHandlerAddText(handler, text);
     OH_Drawing_TypographyHandlerPopTextStyle(handler);
     OH_Drawing_Typography* typography = OH_Drawing_CreateTypography(handler);