audio/asterisk-flite: Update 3.0 => 3.0.20230702 (last commit)

Commit log:
https://github.com/zaf/Asterisk-Flite/compare/2bdc757...a3ed851

Improve port:

• Add flavors asterisk20 and asterisk22.
• Set default flavor to asterisk22.
• Fix warnings from portclippy.
• Refresh patch.