style(docs-infra): fix docs examples for tslint rule semicolon (#38143)

This commit updates the docs examples to be compatible with the
`semicolon` tslint rule.

This is in preparation of updating the docs examples `tslint.json` to
match the one generated for new Angular CLI apps in a future commit.

PR Close #38143

aio/content/examples/router/src/app/crisis-center/mock-crises.ts

@@ -6,4 +6,4 @@ export const CRISES: Crisis[] = [
   { id: 2, name: 'Sky Rains Great White Sharks' },
   { id: 3, name: 'Giant Asteroid Heading For Earth' },
   { id: 4, name: 'Procrastinators Meeting Delayed Again' },
-]
+];

aio/content/examples/router/src/app/dialog.service.ts

@@ -19,5 +19,5 @@ export class DialogService {
     const confirmation = window.confirm(message || 'Is it OK?');
 
     return of(confirmation);
-  };
+  }
 }