doc: improve description of --input-type

PR-URL: #43507
Reviewed-By: Luigi Pinca <[email protected]>
Reviewed-By: Colin Ihrig <[email protected]>
Reviewed-By: Antoine du Hamel <[email protected]>
Reviewed-By: James M Snell <[email protected]>
Reviewed-By: Michael Dawson <[email protected]>

Author: cola119

doc/api/cli.md

@@ -597,6 +597,8 @@ 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]`
 
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