TechEmpower benchmark broken

[Matthew McGarvey]

It doesn't look like the person who added is a contributor to the project so feel free to disregard but I thought I'd let y'all know since I'm messing around in there and noticed.

orion: Showing last frame. Use --error-trace for full trace.
orion: In lib/pg/src/pq/connection.cr:311:51
orion:  311 | OpenSSL::Digest.new("SHA256").update(key).final
orion:                                                  ^----
orion: Error: undefined method 'final' for OpenSSL::Digest

I think you just need to update your Dockerfile crystal version and you might hardcode a version of your libraries