doc: remove backticks from Python version list
doc: remove backticks from Python version list

Reviewed-By: Richard Lau <8193d74c06330af7778ef55510160e4e561ed6a1@uk.ibm.com>
Reviewed-By: Christian Clauss <585dd401264c1e46d17ebec1862e5d2a9b6a6c5d@me.com>
PR-URL: https://github.com/nodejs/node-gyp/pull/2011

nodegit/node-gyp,nodejs/node-gyp,nodejs/node-gyp,nodegit/node-gyp,nodejs/node-gyp,nodegit/node-gyp,nodejs/node-gyp,nodegit/node-gyp,nodegit/node-gyp,nodejs/node-gyp