Update post-rs dependency #1151

Job	Run time
quicktests	27s
lint	18s
unittests (ubuntu-22.04)	1m 59s
coverage	1m 4s
unittests (ubuntu-latest-arm-8-cores)	2m 41s
unittests (macos-13)	1m 56s
unittests (self-hosted, macos, arm64)	42s
unittests (windows-2022)	3m 17s
Build postcli (ubuntu-22.04)	31s
Build postcli (ubuntu-latest-arm-8-cores)	58s
Build postcli (macos-13)	1m 2s
Build postcli (self-hosted, macos, arm64)	14s
Build postcli (windows-2022)	1m 50s
Publish release	0s
	16m 59s

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