Add line above footer on splash component

With the new sitemap at the top of the footer, it makes more sense to
render this on not only GenericPage but also pages that use Splash.

static-site/src/components/splash/index.jsx

@@ -8,7 +8,7 @@ import communityDatasets from "../../../content/community-datasets.yaml";
 import narrativeCards from "../Cards/narrativeCards";
 import Title from "./title";
 import * as Styles from "./styles";
-import { SmallSpacer, BigSpacer, HugeSpacer, FlexCenter } from "../../layouts/generalComponents";
+import { SmallSpacer, BigSpacer, HugeSpacer, FlexCenter, Line } from "../../layouts/generalComponents";
 import Footer from "../Footer";
 import { createGroupCards } from "./groupCards";
 import { UserContext } from "../../layouts/userDataWrapper";
@@ -204,6 +204,7 @@ class Splash extends React.Component {
           </Styles.Button>
         </FlexCenter>
 
+        <Line style={{ margin: "30px 0px 10px 0px" }} />
         <Footer splashImagesCredit/>
 
       </Styles.Container>