Updated LoggedOutNavigationBar log in button background color

• Updated:
- LoggedOutNavigationBar log in button background color to match themes

app/javascript/gabsocial/components/navigation_bar/logged_out_navigation_bar.js

@@ -65,7 +65,7 @@ class LoggedOutNavigationBar extends React.PureComponent {
  isNarrow
  isOutline
  color='brand'
- backgroundColor='white'
+ backgroundColor='none'
  href='/auth/sign_in'
  className={[_s.borderColorWhite, _s.mr5, _s.flexGrow1, _s.aiCenter, _s.jcCenter, _s.py7].join(' ')}
  >