correct twitter handle link#959

<!-- Thanks for submitting a pull request! Please provide enough information so that others can review your pull request. The two fields below are mandatory. --> ## Summary While using the website, I noticed that when you click the "Follow me on Twitter" button, it takes you to a random account with 22 followers instead of @gregberge_, the creator of this repo's twitter account as shown on his website, also linked in this repo. <!-- Explain the **motivation** for making this change. What existing problem does the pull request solve? --> ## Test plan The change is very small and uses only existing code, only swapping the handle in the link for the correct one. I tested it by copying the link and putting it into my browser to confirm it is correct