Fix typo in peer state transition log (#3224)
Fix typo in peer state transition log (#3224)

## Issue Addressed

We were logging `out_finalized_epoch` instead of `our_finalized_epoch`. I noticed this ages ago but only just got around to fixing it.

## Additional Info

I also reformatted the log line to respect the line length limit (`rustfmt` won't do it because it gets confused by the `;` in slog's log macros).



sigp/lighthouse,sigp/lighthouse,sigp/lighthouse,sigp/lighthouse