doc: improve description of --input-type

PR-URL: #43507
Reviewed-By: Luigi Pinca <luigipinca@gmail.com>
Reviewed-By: Colin Ihrig <cjihrig@gmail.com>
Reviewed-By: Antoine du Hamel <duhamelantoine1995@gmail.com>
Reviewed-By: James M Snell <jasnell@gmail.com>
Reviewed-By: Michael Dawson <midawson@redhat.com>

Author: cola119

doc/api/cli.md

@@ -575,6 +575,8 @@ module. String input is input via `--eval`, `--print`, or `STDIN`.
 
 Valid values are `"commonjs"` and `"module"`. The default is `"commonjs"`.
 
+The REPL does not support this option.
+
 ### `--inspect-brk[=[host:]port]`
 
 <!-- YAML