message: Bump the file format in Transaction_LargeUpgrade
diff: @@ -165,9 +165,9 @@ TEST_IF(Transactions_LargeUpgrade, TEST_DURATION > 0)
  util::File f(path, util::File::mode_Update);
  util::File::Map<Header> headerMap(f, util::File::access_ReadWrite);
  auto* header = headerMap.get_addr();
  - // at least one of the versions in the header must be 11.
  - CHECK(header->m_file_format[1] == 11 || header->m_file_format[0] == 11);
  - header->m_file_format[1] = header->m_file_format[0] = 9; // downgrade (both) to previous version
  + // at least one of the versions in the header must be 20.
  + CHECK(header->m_file_format[1] == 20 || header->m_file_format[0] == 20);
  + header->m_file_format[1] = header->m_file_format[0] = 11; // downgrade (both) to previous version
  headerMap.sync();
  }
  sg = DB::create(path); // triggers idempotent upgrade - but importantly for this test, uses compat mapping
  