fix: add .Type as second cache key for helper/image

closes https://github.com/CaiJimmy/hugo-theme-stack/issues/12

layouts/_default/archives.html

@@ -7,7 +7,7 @@
         <div class="category-list">
             <div class="article-list--tile">
                 {{ range $categories }}
-                    {{ partial "article-list/tile" (dict "context" . "size" "250x150") }}
+                    {{ partial "article-list/tile" (dict "context" . "size" "250x150" "Type" "taxonomy") }}
                 {{ end }}
             </div>
         </div>

layouts/_default/term.html

@@ -9,7 +9,7 @@
             {{ end }}
         </div>
 
-        {{ $image := partialCached "helper/image" (dict "Context" . "Type" "taxonomy") .RelPermalink }}
+        {{- $image := partialCached "helper/image" (dict "Context" . "Type" "taxonomy") .RelPermalink "taxonomy" -}}
         {{ if $image.exists }}
             <div class="taxonomy-image">
                 {{ if $image.resource }}