Fix RestGetAction name typo

This changes the name from docuemnt_get_action to document_get_action.

Relates #27266

core/src/main/java/org/elasticsearch/rest/action/document/RestGetAction.java

@@ -50,7 +50,7 @@ public class RestGetAction extends BaseRestHandler {
 
     @Override
     public String getName() {
-        return "docuemnt_get_action";
+        return "document_get_action";
     }
 
     @Override