title: Keeping a fork up to date
body: <p>I wanted to commit somthing to a github repository, but I (obviously) didn't have any rights to do so. I made a fork of that repo, commited my changes and submitted a pull-request.
  Now, the problem is that after a while other people have made commits to the original repo, which means my fork is no longer up-to-date.</p>
  
  <p>How should now update my fork? Is this (<a href="https://stackoverflow.com/a/23853061/5513628">https://stackoverflow.com/a/23853061/5513628</a>) still a valid way or do I have to delete my repo and make a new fork every time?</p>
  
  <p>This is what the fork looks like in github desktop:</p>
  
  <p><a href="https://i.stack.imgur.com/R0hDS.png" rel="noreferrer"><img src="https://i.stack.imgur.com/R0hDS.png" alt="enter image description here"></a></p>
  
  <p>The pull request was made by me but the two commits after that were made by other people. They are not contained in my repo...</p>