templates: use urls.JoinPath when handling URLs

site/layouts/partials/home/plugins.html

@@ -50,6 +50,7 @@
       <hr class="my-4">
       <div class="row g-3">
         {{- range $plugin := .Site.Data.plugins -}}
+          {{- /* TODO we should use urls.JoinPath here too, but the links include `#` which gets escaped */ -}}
           {{- $href := printf "/docs/%s/%s" $.Site.Params.docs_version $plugin.link }}
           <div class="col-sm-6 mb-2">
             <a class="d-block pe-lg-4 text-decoration-none lh-sm" href="{{ $href }}">