Update RELEASE-NOTES.txt

CAY-1981 Add support of N-types (nchar, nvarchar, longnvarchar, nclob)
CAY-1981 Add support of N-types (nchar, nvarchar, longnvarchar, nclob)

Merge branch '57'
CAY-1981 Add support of N-types (nchar, nvarchar, longnvarchar, nclob)

reordering release notes