style: Remove excess padding between footer items

[petesfrench]

Done

• This addresses an issue reported on github by @lyubomir-popov about excess padding between footer items

QA

• Check that the space between footer items is meets @lyubomir-popov requirements
• Check on all screen sizes

Issue / Card

Fixes https://warthogs.atlassian.net/browse/WD-15498 https://github.com/canonical/ubuntu.com/issues/14371