Merge branch 'aregnery/to-do-item-hover' into 'master'

Update class for to-do item on hover

See merge request https://gitlab.com/gitlab-org/gitlab/-/merge_requests/184064



Merged-by: Zack Cuddy <zcuddy@gitlab.com>
Approved-by: Amelia Bauerly <abauerly@gitlab.com>
Approved-by: Minahil Nichols <minahilnichols@gitlab.com>
Approved-by: Zack Cuddy <zcuddy@gitlab.com>
Co-authored-by: Austin Regnery <aregnery@gitlab.com>