CopyToClipboard: Don't crash in Gatsby's server side rendering

See gatsbyjs/gatsby#19317 - even attempting to
reference "navigator" directly will throw an error.

In passing fix whitespace issue in directory.json.

components/CopyToClipboard/index.tsx

@@ -32,7 +32,7 @@ const CopyToClipboard: React.FunctionComponent<Props> = ({
   const [copied, setCopied] = useState(false);
   const [waitingForContent, setWaitingForContent] = useState(false);
   const [copyError, setCopyError] = useState(null);
-  const { clipboard } = navigator;
+  const { clipboard } = typeof navigator === 'object' && navigator;
   if (!clipboard) {
     return null;
   }

directory.json

@@ -2397,4 +2397,4 @@
     "app-errors": "Application / User Errors",
     "unknown": "Unknown Events"
   }
-}
+}