Invalid syntax in instructions to get event handler endpoint

[sbrudz]

When I tried the command to get the event handler endpoint in INSTALL.md, I received the following error:

ERROR: (gcloud.run) unrecognized arguments: --platform (did you mean '--format'?)

It looks like the syntax for gcloud run services has changed as of version 322.0.0 and --platform managed --region ${FOURKEYS_REGION} now need to come after the positional arguments.

The following syntax works:

gcloud run services describe event-handler --platform managed --region ${FOURKEYS_REGION} --format=yaml | grep url | head -1 | sed -e 's/  *url: //g'