links: remove trailing slash in link text

due to URL formatting, the link text of https://example.com was
showing as example.com/

removed trailing slash if possible.

src/utils/dom.ts

@@ -117,11 +117,12 @@ export const parseTextContent = (
             return word;
           }
           firstLink = firstLink || url.href;
+          const prettierWithoutSlash = url.pathname === '/';
           return elem('a', {
             href: url.href,
             target: '_blank',
             rel: 'noopener noreferrer'
-          }, url.href.slice(url.protocol.length + 2));
+          }, url.href.slice(url.protocol.length + 2, prettierWithoutSlash ? -1 : undefined));
         } catch (err) {
           return word;
         }