fix(cli): Don't panic with invalid utf-8

[epage]

Fixes #1373

[coveralls]

Pull Request Test Coverage Report for Build 17466576309

Details

• 0 of 25 (0.0%) changed or added relevant lines in 1 file are covered.
• No unchanged relevant lines lost coverage.
• Overall coverage decreased (-0.1%) to 19.843%

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Changes Missing Coverage	Covered Lines	Changed/Added Lines	%
crates/typos-cli/src/bin/typos-cli/report.rs	0	25	0.0%

Totals
Change from base Build 17444982328:	-0.1%
Covered Lines:	557
Relevant Lines:	2807

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💛 - Coveralls