fixup! fix(test): coerced value for generate column

Author: BuonOmo

test/excludes/PostgresqlVirtualColumnTest.rb

@@ -3,6 +3,9 @@
 exclude :test_build_fixture_sql, "Skipping because CockroachDB cannot write directly to computed columns."
 exclude :test_schema_dumping, "Replaced with local version"
 
+# CRDB doesn't support implicit casts.
+# See https://github.com/cockroachdb/cockroach/issues/75101
+#
 # From: "ASCII(name)"
 #   To: "ASCII(name)""::string"
 CopyCat.copy_methods(self, self, :test_change_table_without_stored_option) do