Better avatar thumbnail filename format

_includes/inline_avatar.html

@@ -3,9 +3,7 @@
     {%- assign first = img | slice: 0, 12 -%}
     {%- if first == '/img/people/' -%}
         {%- assign body = img | slice: 12, 1000 -%}
-        {%- assign index = body | size | minus: 4 -%}
-        {%- assign body = body | slice: 0, index -%}
-        {%- assign img = "/img-thumbnails/people/" | append: body | append: "-48x48.webp" -%}
+        {%- assign img = "/img-thumbnails/people/" | append: body | append: ".webp" -%}
     {%- endif -%}
 {%- endif -%}
 <span class="avatar inline-avatar" role="img" {%- if img -%}style="background-image: url({{img | absolute_url}}), url({{'/assets/avatar.jpg' | absolute_url}})"{%- endif -%}></span>