remove invalid length check (#374)

Author: bkendall

firestore-bigquery-export/extension.yaml

@@ -98,7 +98,7 @@ params:
     description: >-
       What ID would you like to use for your BigQuery dataset? This
       extension will create the dataset, if it doesn't already exist.
-    validationRegex: "^[a-zA-Z0-9_]{1,1024}$"
+    validationRegex: "^[a-zA-Z0-9_]+$"
     validationErrorMessage: >
       BigQuery dataset IDs must be alphanumeric (plus underscores) and must be no more than
       1024 characters.