fix: open ext. links in new tab

Closes #7

src/pages/about.tsx

@@ -132,7 +132,12 @@ const About: React.FC<PageProps<DataProps>> = ({ data, location }) => {
               <br />
               The company supports the development of the Data Controller web
               application and other{' '}
-              <a href="https://sasapps.io" title="SAS Apps">
+              <a
+                target="_blank"
+                rel="noopener"
+                href="https://sasapps.io"
+                title="SAS Apps"
+              >
                 SAS Apps
               </a>
               , and the Macro Cards range of websites listed below: