silence a level-1 diagnostic in README.rest

rst2html -v --strict --exit-status=1 README.rst README.html
README.rst:120: (INFO/1) Duplicate implicit target name: "license".
Exiting due to level-1 (INFO) system message.
make: *** [README.html] Error 1
Merge tag 'v0.1.2'

fixed a level-1 (INFO) diagnostic in README.rest

hoping this would fix the non-rendering in pypi

* tag 'v0.1.2':
  silence a level-1 diagnostic in README.rest