readme.md: fixed unreleased section
readme.md: fixed unreleased section

Arturas-K/xSQLServer,GoelPooja/xSQLServer,bozho/xSQLServer,Blankf/xSQLServer,aultt/xSQLServer,Blankf/xSQLServer,johlju/xSQLServer,Arturas-K/xSQLServer,nabrond/xSQLServer,PaulFeaser/xSQLServer,seizste/xSQLServer,PowerShell/xSQLServer,aboersch/xSQLServer,ChrisLGardner/xSQLServer,GoelPooja/xSQLServer