misc(viewer): mention other lighthouse channels

[staabm]

after the change the site looks like:

closes #10335

[staabm]

interessting.. on the preview-instance the viewer uses a different lighthouse logo:

https://lighthouse-65kq3mhz8.now.sh/viewer/

[patrickhulce]

thanks very much @staabm, exactly what we want!

the only issue I see is that the file open prompt still pops up when you click on the links because they are located within that hitbox, might need to skip our click handler if the target's localName was input OR a

lighthouse/lighthouse-viewer/app/src/lighthouse-report-viewer.js

Lines 84 to 90 in f150573

	placeholderTarget.addEventListener('click', e => {
	const target = /** @type {?Element} */ (e.target);
	if (target && target.localName !== 'input') {
	fileInput.click();
	}
	});

[staabm]

the only issue I see is that the file open prompt still pops up when you click on the links because they are located within that hitbox

lol, good catch. I should have clicked one of the links ;-).

fixed now, thx for the great review and feedback!

[staabm]

(not sure what I need to put in the title to make the linter happy...)

[patrickhulce]

LGTM, thanks @staabm !