refactor: use octokit client

Signed-off-by: Adam Setch <adam.setch@outlook.com>

Author: setchy

src/renderer/utils/api/utils.test.ts

@@ -4,7 +4,6 @@ import {
   getGitHubAPIBaseUrl,
   getGitHubAuthBaseUrl,
   getGitHubGraphQLUrl,
-  getNextURLFromLinkHeader,
 } from './utils';
 
 describe('renderer/utils/api/utils.ts', () => {