doc: strengthen suggestion in errors.md

Sure, I'm advocating for permitting second-person pronouns in a current
PR, but the use in errors.md is superfluous and weakens the sentence.
Remove it.

PR-URL: #34390
Reviewed-By: Anna Henningsen <[email protected]>
Reviewed-By: Michaël Zasso <[email protected]>
Reviewed-By: Juan José Arboleda <[email protected]>
Reviewed-By: James M Snell <[email protected]>
Reviewed-By: Tobias Nießen <[email protected]>
Reviewed-By: Luigi Pinca <[email protected]>

Author: Trott

doc/api/errors.md

@@ -2123,7 +2123,7 @@ signal (such as [`subprocess.kill()`][]).
 <a id="ERR_UNSUPPORTED_DIR_IMPORT"></a>
 ### `ERR_UNSUPPORTED_DIR_IMPORT`
 
-`import` a directory URL is unsupported. Instead, you can
+`import` a directory URL is unsupported. Instead,
 [self-reference a package using its name][] and [define a custom subpath][] in
 the `"exports"` field of the `package.json` file.