message: Fix comment delimiter in README
diff: [comment]: # (and RAJA Performance Suite project contributors.)
  [comment]: # (See the RAJA/COPYRIGHT file for details.)
  [comment]: #
  -[comment]: # (# SPDX-License-Identifier: (BSD-3-Clause))
  +[comment]: # (# SPDX-License-Identifier: BSD-3-Clause)
  [comment]: # (#################################################################)
  