fix: add utrecht-breadcrumb-nav-link-icon-size to known tokens for breadcrumb (#2874)

Author: cascassette

.changeset/spotty-rivers-hammer.md

@@ -0,0 +1,5 @@
+---
+"@utrecht/breadcrumb-nav-css": patch
+---
+
+Add utrecht-breadcrumb-nav-link-icon-size to known tokens

components/breadcrumb-nav/src/tokens.json

@@ -208,6 +208,18 @@
             },
             "type": "color"
           }
+        },
+        "icon": {
+          "size": {
+            "$extensions": {
+              "nl.nldesignsystem.css.property": {
+                "syntax": "<length>",
+                "inherits": true
+              },
+              "nl.nldesignsystem.figma.supports-token": false
+            },
+            "type": "sizing"
+          }
         }
       },
       "separator": {