GitHub has a capital H (#1085)

Only modified for references that are visible in the UI

Author: singingwolfboy

packages/app/src/app/components/NewSandbox/index.js

@@ -125,7 +125,7 @@ function NewSandbox({ signals }) {
  Icon={GithubIcon}
  width={50}
  height={50}
- text="Import from Github"
+ text="Import from GitHub"
  href={importFromGitHubUrl()}
  onClick={() => signals.modalClosed()}
  />

packages/app/src/app/pages/Sandbox/Editor/Header/index.js

@@ -169,7 +169,7 @@ const Header = ({ store, signals }) => {
  ) : (
  <Action
  onClick={() => signals.signInClicked()}
- title="Sign in with Github"
+ title="Sign in with GitHub"
  Icon={GithubIcon}
  highlight
  unresponsive