doc: change "oject" to "object"

PR-URL: nodejs#38256
Reviewed-By: Darshan Sen <raisinten@gmail.com>
Reviewed-By: Harshitha K P <harshitha014@gmail.com>
Reviewed-By: Benjamin Gruenbaum <benjamingr@gmail.com>
Reviewed-By: Richard Lau <rlau@redhat.com>
Reviewed-By: James M Snell <jasnell@gmail.com>

doc/api/vm.md

@@ -1061,7 +1061,7 @@ added: v0.11.7
 * `object` {Object}
 * Returns: {boolean}
 
-Returns `true` if the given `oject` object has been [contextified][] using
+Returns `true` if the given `object` object has been [contextified][] using
 [`vm.createContext()`][].
 
 ## `vm.runInContext(code, contextifiedObject[, options])`