update simulator readme

3 jobs for master in 1 minute and 2 seconds (queued for 1 second)
Status Job ID Name Coverage
  Build
failed #2483
build

00:01:02

 
  Test
skipped #2485
allowed to fail
code_quality
skipped #2484
test
 
Name Stage Failure
failed
build Build
Skipping Git submodules setup
$ if [[ -z "$CI_COMMIT_TAG" ]]; then # collapsed multi-line command
$ /build/build.sh
Building Heroku-based application using gliderlabs/herokuish docker image...
invalid reference format
invalid reference format
invalid argument "/master:cf6b0e0707278f9a94055e22cacb5f5774ab5883" for "-t, --tag" flag: invalid reference format
See 'docker build --help'.
ERROR: Job failed: exit code 1