add back authorization header for github api (#3529)

api/_lib/examples/github-repo-info.ts

@@ -10,6 +10,9 @@ export async function getGitHubRepoInfo(repo: Repo) {
   const response = await fetch(`https://api.github.com/repos/${repo.repo}`, {
     headers: {
       Accept: 'application/vnd.github.machine-man-preview+json',
+      // If we don't use a personal access token, 
+      // it will get rate limited very easily.
+      Authorization: `Bearer ${process.env.GITHUB_ACCESS_TOKEN}`
     },
   });