docs(README): move to .rst extension

4 jobs for branch/default in 1 minute and 19 seconds (queued for 19 seconds)
Status Name Job ID Coverage
  Test
passed check-manifest #62370

00:00:18

passed flake8 #62371

00:00:18

passed py27 #62372

00:01:00

failed py3 #62373

00:01:17

 
Name Stage Failure
failed
py3 Test
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