How chef gets upgraded automatically?

I just installed chef using omnibus:

curl -L https://www.chef.io/chef/install.sh | sudo bash

I got below error:
WARNING WARNING WARNING WARNING WARNING WARNING WARNING WARNING WARNING

You are installing an omnibus package without a version pin.  If you are installing
on production servers via an automated process this is DANGEROUS and you will
be upgraded without warning on new releases, even to new major release.
Letting the version float is only appropriate in desktop, test, development or
CI/CD environments.

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Now I would like to understand how it will be upgraded to new version when it gets released?
beer9Asked:
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Phil DavidsonCommented:
It is potentially dangerous, to proceed this way.  I think future upgrades will all have to happen manually if you proceed.  One issue I see is that commands to tell you what version of Chef that you have may display incorrectly.  I would try running a command to see what version of chef you have in a development environment.
chef-client -version
chef-server -version

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Then install Chef this way you posted.  Then run the command to find the version again.  
chef-client -version
chef-server -version

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Are you consistent with how you apply patches (e.g., pip, yum, apt-get, bundler gem etc.)?  Do you have a schedule to verify you have emergency patches?

I'm not sure who lets their production Chef server get upgraded manually.  I'm not sure how to advise you.  I would see what happens in Development.  Then see if you can regularly update Chef manually (which I would think would be the norm for Chef server).  Upgrading large numbers of Chef clients manually may be difficult.  I'm not sure how often Chef clients need to be updated.

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