Add Troubleshooting for BigQuery Destination. (#6698)

docs/integrations/destinations/bigquery.md

@@ -21,6 +21,10 @@ There are two flavors of connectors for this destination:
 1. Bigquery: This is producing the standard Airbyte outputs using a `_airbyte_raw_*` tables storing the JSON blob data first. Afterward, these are transformed and normalized into separate tables, potentially "exploding" nested streams into their own tables if [basic normalization](../../understanding-airbyte/basic-normalization.md) is configured. 
 2. `Bigquery (Denormalized)`: Instead of splitting the final data into multiple tables, this destination leverages BigQuery capabilities with [Structured and Repeated fields](https://cloud.google.com/bigquery/docs/nested-repeated) to produce a single "big" table per stream. This does not write the `_airbyte_raw_*` tables in the destination and normalization from this connector is not supported at this time.
 
+## Troubleshooting
+
+#### Issue: `Dataset not found` after running sync. [Solution](https://discuss.airbyte.io/t/destination-bigquery-dataset-not-found/52)
+
 ## Output Schema for BigQuery
 
 Each stream will be output into its own table in BigQuery. Each table will contain 3 columns: