fix side bar list style type (mdn#5376)

fixes mdn#5361

(fix:bcd) do not make cells clickable that do not have notes (mdn#5386)

Some cells do not have notes causing `getNotes` to crash because `item` is undefined.
Ensure that a cell has notes before making it clickable.

fix mdn#5385

(chore:issues) add new issue template (mdn#5362)

Co-authored-by: Claas Augner <[email protected]>

enable our redesign banner (mdn#5348)

build(deps): bump lxml from 4.6.1 to 4.6.5 in /testing/integration (m…

…dn#5346)

Redesign (mdn#5337)

MDN redesign

Co-authored-by: Kasey Kelly <[email protected]>
Co-authored-by: Chris Beaven <[email protected]>
Co-authored-by: Michael Trythall <[email protected]>
Co-authored-by: Luciano Ratamero <[email protected]>
Co-authored-by: Nicolas Lara <[email protected]>
Co-authored-by: Guy Sleigh <[email protected]>
Co-authored-by: Schalk Neethling <[email protected]>

build(deps): bump dayjs from 1.10.7 to 1.10.8 (mdn#5340)

build(deps-dev): bump html-validate from 6.3.2 to 6.5.0 (mdn#5335)

build(deps): bump boto3 from 1.21.3 to 1.21.8 in /deployer (mdn#5334)

build(deps): bump actions/setup-node from 2.5.1 to 3 (mdn#5321)

Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>