Update release notes

Signed-off-by: Austin Seipp <austin@well-typed.com>
Revert "Use correct precedence when printing contexts with class operators"

This breaks the build because I am a nincompoop and TyOpPrec doesn't
exit here.

This reverts commit d71f316ef4acb6a967a1f07bc4c1144e553a3ac9.
Undo release notes (re: precedence fix)

Signed-off-by: Austin Seipp <austin@well-typed.com>