unicode/norm: fix naming issue of example

Change-Id: I1cba68281c18adaf571e0dbdc4ad37698d313a5b
Reviewed-on: https://go-review.googlesource.com/38361
Run-TryBot: Marcel van Lohuizen <mpvl@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>
1 file changed