fix: increase chevron icon size to 20px (#23)

Fixes #22

Author: corvid-agent

src/app/components/spec-list/spec-list.scss

@@ -58,7 +58,7 @@
 
 .suite-chevron {
   display: inline-block;
-  font-size: 10px;
+  font-size: 20px;
   transition: transform 0.15s ease;
   flex-shrink: 0;