tesseract.profile: add quiet (netblue30#6173)

Tesseract is a CLI program and its output may be parsed by other
programs (such as `ocrmypdf`).  Including messages from firejail in the
output may break the parsing, so remove them.

Fixes netblue30#6171.

Reported-by: @kmille

etc/profile-m-z/tesseract.profile

@@ -1,6 +1,7 @@
 # Firejail profile for tesseract
 # Description: An OCR program
 # This file is overwritten after every install/update
+quiet
 # Persistent local customizations
 include tesseract.local
 # Persistent global definitions