@clevername27 you can update the snippets in the settings, then it will download the latest collection and overwrite the existing snippets.
Another option is to just checkout the repo with Git and then point HISE to the location. This way you can simply pull the updates and commit your snippets - I‘m using that option.
We highly encourage people to contribute snippet examples so anyone who wants to contribute can get write access to the repo (or you can do pull requests, whatever you prefer).