Fix double quotes in Literal type hint #328

Job	Run time
Test pre-commit console encoding	40s
Test Python 3.8 (ubuntu-latest)	56s
Test Python 3.9 (ubuntu-latest)	1m 13s
Test Python 3.10 (ubuntu-latest)	1m 5s
Test Python 3.11 (ubuntu-latest)	57s
Test Python 3.12 (ubuntu-latest)	19s
Test Python 3.8 (windows-latest)	2m 42s
Test Python 3.9 (windows-latest)	2m 21s
Test Python 3.10 (windows-latest)	2m 28s
Test Python 3.11 (windows-latest)	2m 30s
Test Python 3.12 (windows-latest)	1m 5s
Test Python 3.8 (macOS-latest)	1m 27s
Test Python 3.9 (macOS-latest)	1m 54s
Test Python 3.10 (macOS-latest)	2m 3s
Test Python 3.11 (macOS-latest)	1m 15s
Test Python 3.12 (macOS-latest)	42s
	23m 37s

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