bottle: no need to set cellar anymore

[iMichka]

Fixes:
Calling cellar in a bottle block is deprecated! Use brew style --fix on the formula to update the style or use sha256 with a cellar: argument instead.

Fix the error message:
brew style --fix does nothing for this issue

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[BrewTestBot]

Review period will end on 2021-04-12 at 21:21:52 UTC.

[iMichka]

I hope this fixes the issue, as I was not able to reproduce it locally.

[BrewTestBot]

Review period skipped due to critical label.

[Bo98]

brew style --fix should work for old formulae - it didn’t for this case because it wasn’t intended that there was bugs like this.

[iMichka]

I added the "brew fix" line back.