fix hashtag links opening in new tabs (#2373)

components/text.js

@@ -133,9 +133,9 @@ export default memo(function Text ({ rel = UNKNOWN_LINK_REL, imgproxyUrls, child
       if (outlawed) {
         return href
       }
-
+      const isHashLink = href.startsWith('#')
       // eslint-disable-next-line
-      return <Link id={props.id} target='_blank' rel={rel} href={href}>{children}</Link>
+      return <Link id={props.id} target={isHashLink ? undefined : '_blank'} rel={rel} href={href}>{children}</Link>
     },
     img: TextMediaOrLink,
     embed: (props) => <Embed {...props} topLevel={topLevel} />