UI: open brandUrl in new window

[toshi1127]

Issue: #6070

What I did

Opened brandUrl in new window when the brand image was clicked

How to test

• Is this testable with Jest or Chromatic screenshots? Yes. I updated the snapshot.
• Does this need a new example in the kitchen sink apps? No.
• Does this need an update to the documentation? No.

[codecov]

Codecov Report

Merging #6106 into next will decrease coverage by 1.31%.
The diff coverage is 100%.

@@            Coverage Diff            @@
##            next    #6106      +/-   ##
=========================================
- Coverage   37.1%   35.79%   -1.32%     
=========================================
  Files        648      648              
  Lines       9524     9521       -3     
  Branches    1381     1352      -29     
=========================================
- Hits        3534     3408     -126     
- Misses      5411     5536     +125     
+ Partials     579      577       -2

Impacted Files	Coverage Δ
lib/ui/src/components/sidebar/SidebarHeading.js	88.88% <100%> (+0.42%)	⬆️
addons/a11y/src/components/Report/index.tsx	0% <0%> (-100%)	⬇️
addons/a11y/src/constants.ts	0% <0%> (-100%)	⬇️
addons/a11y/src/components/A11YPanel.tsx	0% <0%> (-94.45%)	⬇️
addons/a11y/src/components/Tabs.tsx	0% <0%> (-90.48%)	⬇️
addons/a11y/src/components/Report/Info.tsx	0% <0%> (-85.72%)	⬇️
addons/a11y/src/components/Report/Item.tsx	0% <0%> (-85%)	⬇️
addons/a11y/src/components/Report/Tags.tsx	0% <0%> (-71.43%)	⬇️
addons/a11y/src/components/Report/Rules.tsx	0% <0%> (-66.67%)	⬇️
addons/a11y/src/components/Report/Elements.tsx	0% <0%> (-63.64%)	⬇️
... and 7 more

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[ndelangen]

I like it! one feature-request and then this will get merged:

Please only add the target when the url is an external link.

[toshi1127]

@ndelangen
only added the target when the url is an external link.
Please confirm!!

[ndelangen]

If target is an empty string, target="" I guess nothing special happens.

Not having the prop at all seems a bit cleaner to me, but this is good to merge IMHO!

Good addition @toshi1127 👍