Update umbraco-marketplace.json

Author: acoumb

src/Umbraco.Forms.Integrations.Commerce.EMerchantPay/umbraco-marketplace.json

@@ -4,7 +4,7 @@
     "Url": "https://umbraco.com/",
     "ImageUrl": "https://avatars.githubusercontent.com/u/1419552?s=200&v=4"
   },
-  "Category": "Forms Extensions",
+  "Category": "Commerce",
   "LicenseType": "Free",
   "PackageType": "Integration",
   "PackagesByAuthor": [ "Umbraco.Forms.Integrations.Crm.ActiveCampaign", "Umbraco.Forms.Integrations.Crm.Hubspot", "Umbraco.Forms.Integrations.Automation.Zapier" ],