doc: fix broken sentence in URL.parse

PR-URL: #59164
Refs: https://developer.mozilla.org/en-US/docs/Web/API/URL/parse_static#return_value
Reviewed-By: James M Snell <jasnell@gmail.com>
Reviewed-By: Chemi Atlow <chemi@atlow.co.il>
Reviewed-By: Moshe Atlow <moshe@atlow.co.il>
Reviewed-By: Zeyu "Alex" Yang <himself65@outlook.com>
Reviewed-By: Luigi Pinca <luigipinca@gmail.com>

Author: SuperchupuDev

doc/api/url.md

@@ -716,7 +716,7 @@ added: v22.1.0
 
 Parses a string as a URL. If `base` is provided, it will be used as the base
 URL for the purpose of resolving non-absolute `input` URLs. Returns `null`
-if `input` is not a valid.
+if the parameters can't be resolved to a valid URL.
 
 ### Class: `URLSearchParams`