Updated replication key

Author: mvistry

_data/taps/schemas/google-analytics-4/v1/google-analytics-4-v1-tables.yml

@@ -12,8 +12,8 @@ tables:
 
       - The account ID, web property ID, and profile ID of the associated report
       - Pairs of `ga:dimension_name` and `dimension_value`
-      - The `start_date` and `end_date` values for the record, in `YYYY-mm-dd` format
+      - The `start_date` and `end_date` values for the record, in `YYYY-MM-DD` format
   table-details:
     replication-method: Key-based Incremental
     primary-key: _sdc_record_hash
-    replication-key: start_date
+    replication-key: last_report_date

_saas-integrations/ga4/v1/ga4-v1.md

@@ -215,7 +215,7 @@ replication-sections:
       - title: "Replication Method"
         anchor: "replication-method"
         content: |
-          Custom reports in {{ integration.display_name }} are replicated using Key-based Incremental Replication with `start_date` as a Replication Key. A `start_date` value is a date in `YYYY-MM-DD` format.
+          Custom reports in {{ integration.display_name }} are replicated using Key-based Incremental Replication with `last_report_date` as a Replication Key. A `last_report_date` value is a date in `YYYY-MM-DD` format.
 
       - title: "Renamed reports"
         anchor: "renamed-reports"