Fix output name not set to what Flutter expects

3 jobs for v0.11.2 in 4 minutes and 34 seconds (queued for 1 second)
latest
Status Job ID Name Coverage
  Build
passed #1225
docker
build

00:04:06

 
  Release
passed #1226
docker
release

00:00:12

passed #1227
docker
sentry

00:00:15