Bug 1508435 - Enable browser_markup_screenshot_node_shadowdom;r=jmaher

I just landed the patch that fixes this intermittent, can we reenable?

Differential Revision: https://phabricator.services.mozilla.com/D15806

--HG--
extra : moz-landing-system : lando

devtools/client/inspector/markup/test/browser.ini

@@ -176,7 +176,6 @@ skip-if = verify
 [browser_markup_screenshot_node.js]
 [browser_markup_screenshot_node_iframe.js]
 [browser_markup_screenshot_node_shadowdom.js]
-skip-if = os == "win" && !debug # skip on Windows opt/pgo platforms Bug 1508435
 [browser_markup_search_01.js]
 [browser_markup_shadowdom.js]
 [browser_markup_shadowdom_clickreveal.js]