MWPW-162959: Swap aa endpoint (#269)

* Changing the API endpoint to POST to for AA form fills

* Adding content type header

scripts/aa-university.js

@@ -15,9 +15,10 @@ export default function registerAAUniversity() {
 
   if (group) postBody.group = group.content;
 
-  fetch('https://us-central1-adobe---aa-university.cloudfunctions.net/register', {
+  fetch('https://14257-bacomaaep-stage.adobeio-static.net/api/v1/web/bacom-umep/register', {
     method: 'POST',
     body: JSON.stringify(postBody),
+    headers: { 'Content-Type': 'application/json' },
   })
     .catch((error) => window.lana.log(`Marketo AA University Error: ${error}`));