feat(SocialLink): add fallback to FaExternalLinkAlt

this will be used, when no iconName is provided

src/components/SocialLink/SocialLink.tsx

@@ -7,6 +7,7 @@ import {
   FaYoutube,
   FaGithub,
   FaInstagram,
+  FaExternalLinkAlt
 } from "react-icons/fa";
 
 const icons = {
@@ -25,9 +26,7 @@ export interface Props {
 }
 
 const SocialLink: React.FC<Props> = ({ href, iconName }) => {
-  const Icon = icons[iconName];
-
-  if (Icon) {
+  const Icon = icons[iconName] || FaExternalLinkAlt;
   return (
     <a
       href={href}
@@ -39,9 +38,6 @@ const SocialLink: React.FC<Props> = ({ href, iconName }) => {
       <Icon className="social-icon" />
     </a>
   );
-  }
-  console.error(`The iconname is unknown: ${iconName}`);
-  return null;
 };
 
 export default SocialLink;