Add missing newline before the previous release. (#1424)
Add missing newline before the previous release. (#1424)

The last line of the `unreleased` log contains the heading of the previous release. This PR adds that missing newline, restoring proper formatting.
sgebbie/ponyc,cquinn/ponyc,dipinhora/ponyc,mkfifo/ponyc,boemmels/ponyc,mkfifo/ponyc,cquinn/ponyc,Theodus/ponyc,CausalityLtd/ponyc,mkfifo/ponyc,jupvfranco/ponyc,sgebbie/ponyc,Theodus/ponyc,boemmels/ponyc,ponylang/ponyc,boemmels/ponyc,sgebbie/ponyc,kulibali/ponyc,CausalityLtd/ponyc,boemmels/ponyc,Theodus/ponyc,Perelandric/ponyc,Perelandric/ponyc,CausalityLtd/ponyc,jupvfranco/ponyc,kulibali/ponyc,Theodus/ponyc,sgebbie/ponyc,kulibali/ponyc,Perelandric/ponyc,cquinn/ponyc,cquinn/ponyc,Praetonus/ponyc,jemc/ponyc,Perelandric/ponyc,Praetonus/ponyc,dipinhora/ponyc,Praetonus/ponyc,kulibali/ponyc,Theodus/ponyc,Praetonus/ponyc,ponylang/ponyc,jupvfranco/ponyc,jemc/ponyc,jupvfranco/ponyc,dipinhora/ponyc,mkfifo/ponyc,sgebbie/ponyc,Perelandric/ponyc,jupvfranco/ponyc,ponylang/ponyc,mkfifo/ponyc,jemc/ponyc,boemmels/ponyc