fixed wrong method name while calling (#8182)

fixed wrong method name while calling (#8182)

diff --git a/app/assets/javascripts/discourse/lib/plugin-api.js.es6 b/app/assets/javascripts/discourse/lib/plugin-api.js.es6
index 76959bd..f54c0f4 100644
--- a/app/assets/javascripts/discourse/lib/plugin-api.js.es6
+++ b/app/assets/javascripts/discourse/lib/plugin-api.js.es6
@@ -857,7 +857,7 @@ class PluginApi {
    *
    */
   serializeToDraft(fieldName, property) {
-    Composer.serialzeToDraft(fieldName, property);
+    Composer.serializeToDraft(fieldName, property);
   }
 
   /**

GitHub sha: 3bcfa158