Avoid double-rendering of link .Text (#1392)
Avoid double-rendering of link .Text (#1392)

This is a common source of infinite recursion (stack overflow) when the `linkify` option is enabled.

In the upcoming Hugo 0.94.0 building will fail without this patch:

```bash
Error: Error building site: "/Users/bep/dev/sites/website/layouts/_default/_markup/render-link.html:11:14": execute of template failed: template: _default/_markup/render-link.html:11:14: executing "_default/_markup/render-link.html" at <markdownify>:
error calling markdownify: text is already rendered, repeating it may cause infinite recursion
```
letsencrypt/website,letsencrypt/website,letsencrypt/website