chore(base32): extend spell-checker ignore list with test token

- Add "hellohello" to ignored words to prevent false positives
- Keeps spell-checker from flagging known test data in base_common.rs

Author: mattsu2020

src/uu/base32/src/base_common.rs

@@ -3,7 +3,7 @@
 // For the full copyright and license information, please view the LICENSE
 // file that was distributed with this source code.
 
-// spell-checker:ignore hexupper lsbf msbf unpadded nopad aGVsbG8sIHdvcmxkIQ
+// spell-checker:ignore hexupper lsbf msbf unpadded nopad aGVsbG8sIHdvcmxkIQ hellohello
 
 use clap::{Arg, ArgAction, Command};
 use std::ffi::OsString;