doc: clarify ERR_INVALID_REPL_INPUT usage

The REPL documentation does not list prohibited inputs, but it does
explain the conditions under which ERR_INVALID_REPL_INPUT is used.
Update the error doc to indicate that.

Author: Trott

doc/api/errors.md

@@ -1568,8 +1568,8 @@ which is not supported.
 <a id="ERR_INVALID_REPL_INPUT"></a>
 ### `ERR_INVALID_REPL_INPUT`
 
-The input may not be used in the [`REPL`][]. All prohibited inputs are
-documented in the [`REPL`][]'s documentation.
+The input may not be used in the [`REPL`][]. The conditions under which this
+error is used are describe in the [`REPL`][] documentation.
 
 <a id="ERR_INVALID_RETURN_PROPERTY"></a>
 ### `ERR_INVALID_RETURN_PROPERTY`