chore: Standardize code, comments and docs on US-English spelling (#2707)

tests/card-controller/issues/issue-manager.test.ts

@@ -873,7 +873,7 @@ describe('IssueManager', () => {
 
       // The attempt is now in flight: the problem is still unresolved
       // (needsRetry) but cannot be retried right now (canRetryNow). The running
-      // timer is cancelled and no further attempt fires, however long we wait.
+      // timer is canceled and no further attempt fires, however long we wait.
       canRetryNow.mockReturnValue(false);
       manager.evaluate();
       vi.advanceTimersByTime(RETRY_EXPONENTIAL_MAX_SECONDS * 1000);

tests/card-controller/issues/issues/media-unavailable.browser.test.ts

@@ -488,7 +488,7 @@ describe('MediaUnavailableIssue', () => {
 
     await card.events.waitForFirst('advanced-camera-card:issue:trigger');
 
-    // The status bar only summarises. Everything a user can do about the
+    // The status bar only summarizes. Everything a user can do about the
     // failure is behind it, which is the point of the issue report being
     // clickable.
     await card.clickControl(MEDIA_ISSUE_TITLE);