i am using puppeteer to web scrap github.com website. in the inspect panel of following page i can see my target button that is a input tag in a form (unfollow button), but when i scrap this page there is no form and no input and it is replaced with just an anchor tag with following code:

<a class="btn btn-sm" data-hydro-click="{"event_type":"authentication.click","payload":{"location_in_page":"follow button","repository_id":null,"auth_type":"LOG_IN","originating_url":"https://github.com/nariman?tab=following","user_id":null}}" data-hydro-click-hmac="25efb463713bdd46af72c6097909bd1999b37cad325d1e34232bfa7ddf45a5eb" href="/login?return_to=https%3A%2F%2Fgithub.com%2Fnariman%3Ftab%3Dfollowing">Follow</a>

can you explain this?