gh-135995: Fix missing char in palmos encoding (#135990)

0x8b correctly encodes to ‹, but 0x9b was mistakenly marked as a control character instead of ›.
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Co-authored-by: blurb-it[bot] <43283697+blurb-it[bot]@users.noreply.github.com>
Co-authored-by: Brian Schubert <brianm.schubert@gmail.com>
Co-authored-by: Terry Jan Reedy <tjreedy@udel.edu>