Bump post-rs to v0.6.1 #973

Job	Run time
quicktests	42s
lint	14s
unittests (ubuntu-latest)	1m 45s
coverage	1m 38s
unittests (self-hosted, linux, arm64)	1m 35s
unittests (macos-latest)	2m 37s
unittests (self-hosted, macos, arm64)	1m 16s
unittests (windows-latest)	5m 59s
Build postcli (ubuntu-latest)	47s
Build postcli (self-hosted, linux, arm64)	18s
Build postcli (macos-latest)	1m 28s
Build postcli (self-hosted, macos, arm64)	25s
Build postcli (windows-latest)	2m 14s
Publish release	0s
	20m 58s

Provide feedback