String values in Spanner Studio query results are now enclosed in double quotes, providing a clear visual cue to differentiate

## Change Change String values in[Spanner Studio query results](https://docs.cloud.google.com/spanner/docs/manage-data-using-console#create-modify-query-data)are now enclosed in double quotes, providing a clear visual cue to differentiate string values from other data types. This enhancement is for display purposes only and does not affect how data is exported or accessed.