Fix `unsafe` expressions in `NoAssignmentInExpressions` #424

Job	Run time
Test / Linux (5.9 - jammy)	2m 12s
Test / Windows (5.9 - windows-2022)	19m 6s
Test / Linux (5.10 - jammy)	2m 13s
Test / macOS (Xcode ${{ matrix.xcode_version }} - ${{ matrix.os_version }} - ${{ matrix.arch }})	0s
Test / Windows (6.0 - windows-2022)	12m 44s
Test / Linux (6.0 - jammy)	2m 32s
Test / Windows (6.1 - windows-2022)	23m 39s
Test / Linux (6.1 - jammy)	3m 5s
Test / Windows (nightly - windows-2019)	15m 4s
Test / Linux (nightly-main - jammy)	4m 17s
Test / Windows (nightly-6.1 - windows-2019)	15m 33s
Test / Linux (nightly-6.1 - jammy)	4m 0s
Soundness / API breakage check	3m 22s
Soundness / Documentation check	2m 4s
Soundness / Broken symlinks check	3s
Soundness / Format check	32s
Soundness / License headers check	4s
Soundness / Python lint check	6s
Soundness / Shell check	31s
Soundness / Unacceptable language check	3s
Soundness / YAML lint check	4s
	1h 51m 14s

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