kiji-rest: Update release notes for version 1.2.2

commit: https://github.com/kijiproject/kiji-rest/commit/a3e248db9bc8b8e3df5367cd7776d608d84106e2
kiji-rest: Update dependency on kiji-scoring to latest released version

commit: https://github.com/kijiproject/kiji-rest/commit/85003bb35f064c01309229c9636fb5984cce8abc