fixed issue where greetings.html partial did not properly over ride the default authur image

Author: HC-marcdicarlo

layouts/partials/home/greetings.html

@@ -1,7 +1,7 @@
 {{- if site.Params.rtwt.home.showBio -}}
   <div class="greetings">
     {{- if site.Params.rtwt.home.showAuthorImg -}}
-      <img style="border-radius:100%;" width="70px" src="images/profile.jpg"/>
+      <img style="border-radius:100%;" width="70px" src="{{- site.Data.rtwt.content.home.image | default "images/profile.jpg" -}}"/>
     {{- end -}}
 
     <h1 class="greetings-title">{{- site.Data.rtwt.content.home.greetings -}}</h1>