Use PTSans font for Rei to match previous chapters

- The last commit used 'DejaVuSans+MS-PGothic.ttf'
 - The correct font is 'PTSans+MS-PGothic.ttf'
 - 'PTSans+MS-PGothic.ttf' Does not support all

assets/files-rei/.ignore_PTSans_MS-PGothic_support_more_characters/Readme.md

@@ -0,0 +1,3 @@
+Use these files if you find the default font does not support your language.
+
+If your language is still missing characters, you will need to create a new font (or ask us to).