tree d90dfd188db61f0aded5ed4f1fbd12cf00f3466a
parent 6ae0ed557843cc3d943a92c8914c538bf881f74d
author Nasser Grainawi <nasser.grainawi@linaro.org> 1722441197 -0600
committer Nasser Grainawi <nasser.grainawi@linaro.org> 1722441197 -0600

Replace deprecated css variable

The `assignee` styles are long deprecated and will be removed anytime.
Use the equivalent replacement added in change Ifba52ecf25a1d8c3705d60655d9bcb45fa2669bd
and available since Gerrit v3.8.

This also fixes how the banner appears in dark mode on those Gerrit
versions since the dark mode variable override was removed.

Change-Id: Iaed9a658904d6566b8ec67ddc47705e479642c66