Update corpus test expectations for Freetype change

Freetype change [1] has affected some text rendering results. This
CL is a continuous effort based on [2] to update corpus test
expectations accordingly.

[1] https://crrev.com/7809007a5b88b15207d6c6680cd8a979b122eafa
[2] https://pdfium-review.googlesource.com/c/pdfium_tests/+/88830

Change-Id: I9254bcc6a28518a98eb7aaf75c342ab1b49e4111
Reviewed-on: https://pdfium-review.googlesource.com/c/pdfium_tests/+/88871
Reviewed-by: Lei Zhang <thestig@chromium.org>