doc: add missing space

PR-URL: #14181
Reviewed-By: Evan Lucas <evanlucas@me.com>
Reviewed-By: Anna Henningsen <anna@addaleax.net>
Reviewed-By: Colin Ihrig <cjihrig@gmail.com>
Reviewed-By: Tobias Nießen <tniessen@tnie.de>
Reviewed-By: Vse Mozhet Byt <vsemozhetbyt@gmail.com>
Reviewed-By: Rich Trott <rtrott@gmail.com>

doc/api/errors.md

@@ -645,7 +645,7 @@ urlSearchParams.has.call(buf, 'foo');
 ### ERR_INVALID_TUPLE
 
 Used when an element in the `iterable` provided to the [WHATWG][WHATWG URL
-API] [`URLSearchParams`constructor][`new URLSearchParams(iterable)`] does not
+API] [`URLSearchParams` constructor][`new URLSearchParams(iterable)`] does not
 represent a `[name, value]` tuple – that is, if an element is not iterable, or
 does not consist of exactly two elements.