chore: Upgrade @api-components/amf-helper-mixin to version 4.5.31

- Updated the version of @api-components/amf-helper-mixin in package.json and package-lock.json from 4.5.30 to 4.5.31 for improved functionality and compatibility.

Author: alexpmule

package-lock.json

@@ -45,7 +45,7 @@
     "@anypoint-web-components/anypoint-dropdown": "^1.1.7",
     "@anypoint-web-components/anypoint-item": "^1.1.3",
     "@anypoint-web-components/anypoint-listbox": "^1.1.7",
-    "@api-components/amf-helper-mixin": "^4.5.30",
+    "@api-components/amf-helper-mixin": "^4.5.31",
     "@api-components/api-annotation-document": "^4.2.1",
     "@api-components/api-body-document": "^4.4.6",
     "@api-components/api-example-generator": "^4.4.8",