fix: updated product icons

Author: Kapil Gowru

fern/assets/styles.css

@@ -181,8 +181,8 @@
   content: url("https://fern-docs.s3.us-east-2.amazonaws.com/product-switcher/product-switcher-askfern-dark.png") !important;
 }
 
-:is(.dark) .fern-product-selector-radio-group a[href*="api-definition"] img {
-  content: url("https://fern-docs.s3.us-east-2.amazonaws.com/product-switcher/api-definitions-dark.png") !important;
+:is(.dark) .fern-product-selector-radio-group a[href*="openapi-definition"] img {
+  content: url("https://fern-docs.s3.us-east-2.amazonaws.com/product-switcher/openapi-definition-dark.png") !important;
 }
 
 :is(.dark) .fern-product-selector-radio-group a[href*="cli-api-reference"] img {