replace events_metrics_v2 metadata.yaml file with the proper one. Previous one was the page_metrics metadata.yaml file (#6114)

sql/moz-fx-data-shared-prod/mozilla_org_derived/www_site_events_metrics_v2/metadata.yaml

@@ -1,11 +1,12 @@
-friendly_name: WWW Site Page Metrics V2
+friendly_name: WWW Site Events Metrics V2
 description: |-
-  Aggregated metrics per page on www.mozilla.org from Google Analytics 4
+  Aggregated metrics on non-page view events on www.mozilla.org
+  Sourced from Google Analytics 4 (GA4) data
 owners:
-- kwindau@mozilla.com
+- mhirose@mozilla.com
 labels:
   incremental: true
-  owner1: kwindau@mozilla.com
+  owner1: mhirose@mozilla.com
 scheduling:
   dag_name: bqetl_google_analytics_derived_ga4
 bigquery:
@@ -16,8 +17,8 @@ bigquery:
     expiration_days: null
   clustering:
     fields:
-    - page_name
-    - locale
     - country
-    - medium
+    - device_category
+    - event_category
+    - browser
 references: {}