As obsolete notice to config.xml plugin documentation (#1229)
diff --git a/www/docs/en/dev/config_ref/index.md b/www/docs/en/dev/config_ref/index.md
index 2d98876..9fc9661 100644
--- a/www/docs/en/dev/config_ref/index.md
+++ b/www/docs/en/dev/config_ref/index.md
@@ -246,6 +246,8 @@
the `--save` flag. See the [CLI reference][plugin_cli] for more information on
adding plugins.
+_Note: As of Cordova 9.x, this tag is obsolete. [Learn More](https://github.com/apache/cordova-lib/pull/750)_
+
Attributes(type) <br/> <span class="sub-header">Only for platform:</span> | Description
----------------- | ------------
name(string) | *Required* <br/> Name of the plugin to be restored
