Bug 1776752 follow-up - Fix a broken test. r=#thunderbird-reviewers,freaktechnik

Differential Revision: https://phabricator.services.mozilla.com/D150533

--HG--
extra : amend_source : b56985c2ab4fee5f30abe19aedc50e538cb27d34
extra : histedit_source : dd04c542b1a26e7912a673ed9e1fe2a31a7cf00c

calendar/test/browser/browser_todayPane.js

@@ -103,7 +103,7 @@ function checkEvent(row, { dateHeader, time, title, relative, overlap, classes =
     Assert.ok(BrowserTestUtils.is_visible(overlapElement), "overlap is visible");
     Assert.equal(
       overlapElement.src,
-      `chrome://calendar/skin/shared/event-${overlap}.svg`,
+      `chrome://messenger/skin/icons/new/event-${overlap}.svg`,
       "overlap has correct image"
     );
     Assert.equal(