Wrong labels in sample efficiency curves

[matteobettini]

In the sample efficiency curves like this one from the notebook the x-axis labels will say "milions" even though the data scale is reported in units (as you can see by the 1e6 in the bottom left

this means that for runs with less frames you will get results like

where this run was only over 12_000 frames and not 12_000 million frames

[RuanJohn]

Hi @matteobettini, thank you for the raising the issue! Apologies for the slow reply. For some reason I didn't get notified.
I will make a fix for this.