scripts/supybot: round total CPU time to 2 decimal places
scripts/supybot: round total CPU time to 2 decimal places

This prevents rather silly things such as 0.9400000000001 from showing up.

(cherry picked from commit GLolol/Limnoria@2d5e936f0d10329bc7a92b11dcb9f1887746a080)

Ban3/Limnoria,ProgVal/Limnoria-test,Ban3/Limnoria,ProgVal/Limnoria-test