ci: pyinstaller: warning: smda invalid syntax

[williballenthin]

https://github.com/fireeye/capa/runs/1856526108?check_suite_focus=true

('Syntax error in ', 'D:\\a\\capa\\capa\\capa\\features\\extractors\\smda\\__init__.py')
('invalid syntax', ('D:\\a\\capa\\capa\\capa\\features\\extractors\\smda\\__init__.py', 16, 35, '    def __init__(self, smda_report: SmdaReport, path):\n'))

SMDA uses py3-style type annotations that are not valid for py2.

[williballenthin]

pyinstaller builds for py2-only, and the SMDA code is meant for py3 interpreters only. so, this is not really an issue.