Auto merge of #4443 - Nitrodist:update-bundle-install-documentation-with-frozen, r=segiddins
Auto merge of #4443 - Nitrodist:update-bundle-install-documentation-with-frozen, r=segiddins

Update bundle install man page with --frozen option

This option has existed since v1.1 and we're currently on v1.11!

dilumnavanjana/bundler,RochesterinNYC/bundler,asutoshpalai/bundler,mvz/bundler,bundler/bundler,RochesterinNYC/bundler,dilumnavanjana/bundler,asutoshpalai/bundler,bundler/bundler,mvz/bundler