Fixed: entire repository size not shown on nav

[takuyahara]

After

Before

console.log(document.querySelector('.js-repo-nav > ul')); // null

Diff

export function getNavButtons() {
-  return document.querySelector('.js-repo-nav > ul') as HTMLUListElement | null;
+  return document.querySelector('nav[aria-label="Repository"] > ul') as HTMLUListElement | null;
}

[envico801]

Works fine 👍, i will use this until the maintainer merges it

[thedavidweng]

@AminoffZ This is essential, please review the PR