message: fix: GSheets supports JOINs
diff: @@ -32,7 +32,7 @@ class GSheetsEngineSpec(SqliteEngineSpec):
  engine = "gsheets"
  engine_name = "Google Sheets"
  - allows_joins = False
  + allows_joins = True
  allows_subqueries = True
  custom_errors: Dict[Pattern[str], Tuple[str, SupersetErrorType, Dict[str, Any]]] = {
  