[doc] Release notes for 0.1.8 #1896

Job	Run time
build (ubuntu-latest, 4.14.x)	10m 45s
client-compile	19s
Nix Flake Check	1m 6s
Nix (ubuntu-latest)	2m 2s
build (ubuntu-latest, 4.13.x)	10m 38s
Nix (macOS-latest)	4m 59s
build (ubuntu-latest, 4.12.x)	16m 1s
build (ubuntu-latest, 4.11.x)	10m 40s
build (ubuntu-latest, 5.0.x)	17m 27s
build (ubuntu-latest, 5.1.x)	8m 28s
build (macos-latest, 4.14.x)	29m 11s
build (Windows Latest, 4.14, windows-latest)	16m 9s
	2h 7m 45s

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