Update wren referral link (#1194)

* update wren referral link

* fix integration test

cypress/integration/security.spec.js

@@ -26,7 +26,10 @@ describe('security', () => {
   })
   it('/offsets -> Project Wren', () => {
     cy.visit(`/offsets`)
-    cy.url().should('eq', 'https://www.wren.co/join/carbon?ref=wrenlink')
+    cy.url().should(
+      'eq',
+      'https://www.wren.co/join/carbon?utm_campaign=share&utm_medium=profile_referral_link'
+    )
   })
   it('/privacy -> Privacy policy', () => {
     cy.visit(`/privacy`)

next.config.js

@@ -55,7 +55,7 @@ module.exports = withBundleAnalyzer(
         {
           source: '/offsets',
           destination:
-            'https://wren.link/join/carbon?utm_campaign=share&utm_medium=profile_referral_link',
+            'https://www.wren.co/join/carbon?utm_campaign=share&utm_medium=profile_referral_link',
           permanent: false,
         },
       ]