docs: show server side apply overwrite for CLI

Docs currently say how to do it with HTTP request.
This addition will help `kubectl` users as well.

Author: davidxia

content/en/docs/reference/using-api/server-side-apply.md

@@ -125,7 +125,8 @@ this occurs, the applier has 3 options to resolve the conflicts:
 
 * **Overwrite value, become sole manager:** If overwriting the value was
   intentional (or if the applier is an automated process like a controller) the
-  applier should set the `force` query parameter to true and make the request
+  applier should add `--force-conflicts` to `kubectl apply` or set
+  the `force` query parameter to true and make the request
   again. This forces the operation to succeed, changes the value of the field,
   and removes the field from all other managers' entries in managedFields.