dev-haskell/yaml: bump up to 0.8.6.2

Package-Manager: portage-2.2.8-r1
dev-haskell/fixed-vector: bump up to 0.6.2.0

Package-Manager: portage-2.2.8-r1
dev-haskell/webkit: fix SLOT=3 package name (found by silasm).

Signed-off-by: Sergei Trofimovich <slyfox@gentoo.org>