chore(doc): rename global to config

Co-authored-by: Manushak Keramyan <[email protected]>
Signed-off-by: Narek Hovhannisyan <[email protected]>

README.md

@@ -80,7 +80,7 @@ initialize:
     my-custom-plugin:
       method: MyCustomPlugin
       path: https://github.com/my-repo/my-plugin
-      global-config:
+      config:
         ...
 ...
 ```