message: remove superfluous `*` in tools README.md
diff: @@ -50,7 +50,7 @@ then the following executables will be compiled:
  * `--hex`: try to turn hex-encoded input into binary vpack
  On Linux, *vpack-validate* supports the pseudo filename `-` for stdin.
  -*
  +
  * `fuzzer`: this tool can be used generate random VPack or JSON structures and
  validate them.
  These are the options for running this tool:
  