Resolve "Rename category "Use Case" to "use-case" to remove whitespace"

Closes #336 (closed)

usecases.md

@@ -15,7 +15,7 @@ This is a preliminary list of Community Use Cases of HIFIS Services successfully
 
 
 <div class="flex-cards">
-{%- assign posts = site.categories['Use Case'] | where: "lang", "en" -%}
+{%- assign posts = site.categories['use-case'] | where: "lang", "en" -%}
 {% for post in posts -%}
 {% include cards/usecase_card_image.html post=post excerpt=true%}
 {% endfor -%}