refactor: replace site.Params.link_authors with Hugo's new _build capability

Hugo now directly supports page build options, so can remove workaround.

wowchemy/layouts/partials/page_author_card.html

@@ -14,14 +14,14 @@
   {{ $avatar_shape := site.Params.avatar.shape | default "circle" }}
   <div class="media author-card content-widget-hr">
     {{ if and site.Params.avatar.gravatar $author_page.Params.email }}
-      <a href="{{$profile_url}}"><img class="avatar mr-3 {{if eq $avatar_shape "square"}}avatar-square{{else}}avatar-circle{{end}}" src="https://s.gravatar.com/avatar/{{ md5 $author_page.Params.email }}?s=200')" alt="{{$author_page.Title}}"></a>
+      {{if $profile_url}}<a href="{{$profile_url}}">{{end}}<img class="avatar mr-3 {{if eq $avatar_shape "square"}}avatar-square{{else}}avatar-circle{{end}}" src="https://s.gravatar.com/avatar/{{ md5 $author_page.Params.email }}?s=200" alt="{{$author_page.Title}}">{{if $profile_url}}</a>{{end}}
     {{ else if $avatar }}
       {{ $avatar_image := $avatar.Fill "270x270 Center" }}
-      <a href="{{$profile_url}}"><img class="avatar mr-3 {{if eq $avatar_shape "square"}}avatar-square{{else}}avatar-circle{{end}}" src="{{ $avatar_image.RelPermalink }}" alt="{{$author_page.Title}}"></a>
+      {{if $profile_url}}<a href="{{$profile_url}}">{{end}}<img class="avatar mr-3 {{if eq $avatar_shape "square"}}avatar-square{{else}}avatar-circle{{end}}" src="{{ $avatar_image.RelPermalink }}" alt="{{$author_page.Title}}">{{if $profile_url}}</a>{{end}}
     {{ end }}
 
     <div class="media-body">
-      <h5 class="card-title"><a href="{{$profile_url}}">{{$author_page.Title}}</a></h5>
+      <h5 class="card-title">{{if $profile_url}}<a href="{{$profile_url}}">{{end}}{{$author_page.Title}}{{if $profile_url}}</a>{{end}}</h5>
       {{ with $author_page.Params.role }}<h6 class="card-subtitle">{{. | markdownify | emojify}}</h6>{{end}}
       {{ with $author_page.Params.bio }}<p class="card-text">{{. | markdownify | emojify}}</p>{{end}}
       {{ partial "social_links" $author_page }}

wowchemy/layouts/partials/page_metadata_authors.html

@@ -2,14 +2,14 @@
 
 {{- $taxonomy := "authors" }}
 {{ if .Param $taxonomy }}
-  {{ $link_authors := site.Params.link_authors | default true }}
   {{ range $index, $value := (.GetTerms $taxonomy) }}
     {{- /* Highlight the author's name? */ -}}
     {{- $highlight_name := .Page.Params.highlight_name | default false -}}
 
     {{- if gt $index 0 }}, {{ end -}}
     <span {{ if $highlight_name }}class="author-highlighted"{{end}}>
-      {{- if $link_authors -}}
+      {{/* Effectively check the page's `_build` option as `_build` is not exposed in Hugo's Page object. */}}
+      {{- if .RelPermalink -}}
         <a href="{{.RelPermalink}}">{{.LinkTitle}}</a>
       {{- else -}}
         {{ .LinkTitle }}

wowchemy/layouts/partials/site_footer.html

@@ -23,7 +23,7 @@
     {{ $hide_published_with_footer := site.Params.power_ups.hide_published_with | default true }}
     {{ if not (and $is_sponsor $hide_published_with_footer) }}
     Published with
-    <a href="https://wowchemy.com" target="_blank" rel="noopener">Wowchemy</a>  —
+    <a href="https://wowchemy.com/?utm_campaign=poweredby" target="_blank" rel="noopener">Wowchemy</a>  —
     the free, <a href="https://github.com/wowchemy/wowchemy-hugo-modules" target="_blank" rel="noopener">
     open source</a> website builder that empowers creators.
     {{ end }}