Use @rustls-benchmarking as the app's name

[aochagavia]

With this change, the name matches the real name of the app that is currently installed on the rustls repo.

@cpu I've chosen to keep the name hardcoded, even though it would be possible to obtain the application's name dynamically using the GitHub API. We aren't planning to deploy multiple instances of this, with different names each, so I'd rather go with this pragmatic choice instead of making things dynamic. If you disagree, let me know and we can discuss (your judgement weights heavier than mine here, IMO, because you are going to actually maintain this the coming months).

[cpu]

The idea of hardcoding the name vs acquiring it programmatically makes sense to me.

WDYT about defining a top-level const somewhere instead of inlining the value throughout so that at the very least if we do decide to change it, or if we end up wanting a second instance, it would be less work to find/replace?

[aochagavia]

Good suggestion, I just pushed an updated commit that uses a static string for the app name and will merge once the CI finishes

[cpu]

Thanks!