update use of gatsby-link

packages/learn/src/components/Header/index.js

@@ -1,5 +1,5 @@
 import React from 'react';
-import Link from 'gatsby-link';
+import { Link } from 'gatsby';
 import FCCSearch from 'react-freecodecamp-search';
 
 import NavLogo from './components/NavLogo';

packages/learn/src/components/Map/components/Block.js

@@ -3,7 +3,7 @@ import PropTypes from 'prop-types';
 import { bindActionCreators } from 'redux';
 import { connect } from 'react-redux';
 import { createSelector } from 'reselect';
-import Link from 'gatsby-link';
+import { Link } from 'gatsby';
 
 import ga from '../../../analytics';
 import { makeExpandedBlockSelector, toggleBlock } from '../redux';

packages/learn/src/pages/404.js

@@ -1,6 +1,6 @@
 import React from 'react';
 import Helmet from 'react-helmet';
-import Link from 'gatsby-link';
+import { Link } from 'gatsby';
 
 import './404.css';
 import notFoundLogo from '../../static/img/freeCodeCamp-404.svg';

packages/learn/src/pages/index.js

@@ -2,7 +2,7 @@
 /* eslint-disable max-len */
 import React from 'react';
 import PropTypes from 'prop-types';
-import Link from 'gatsby-link';
+import { Link } from 'gatsby';
 import Helmet from 'react-helmet';
 import { connect } from 'react-redux';
 

packages/learn/src/templates/Introduction/Intro.js

@@ -1,7 +1,7 @@
 /* global graphql */
 import React, { Fragment } from 'react';
 import PropTypes from 'prop-types';
-import Link, { navigateTo } from 'gatsby-link';
+import { Link, navigate } from 'gatsby';
 import Helmet from 'react-helmet';
 import { Button, ListGroup, ListGroupItem } from 'react-bootstrap';
 
@@ -27,7 +27,7 @@ function renderMenuItems({ edges = [] }) {
 }
 
 function handleCurriculumClick() {
-  return navigateTo('/');
+  return navigate('/');
 }
 
 function IntroductionPage({ data: { markdownRemark, allChallengeNode } }) {