Update pin for libprotobuf

[regro-cf-autotick-bot]

This PR has been triggered in an effort to update the pin for libprotobuf. The current pinned version is 3.16, the latest available version is 3.19 and the max pin pattern is x.x. This migration will impact 38 feedstocks.

Checklist:

• The new version is a stable supported pin.
• I checked that the ABI changed from 3.16 to 3.19.

**Please note that if you close this PR we presume that the new pin has been rejected.

@conda-forge-admin please ping libprotobuf
This PR was generated by https://github.com/regro/autotick-bot/actions/runs/1366725203, please use this URL for debugging

[conda-forge-linter]

Hi! This is the friendly automated conda-forge-webservice.

I was asked to ping @conda-forge/libprotobuf and so here I am doing that.

[conda-forge-linter]

Hi! This is the friendly automated conda-forge-linting service.

I just wanted to let you know that I linted all conda-recipes in your PR (recipe) and found it was in an excellent condition.

[hmaarrfk]

May we get this merged in? the libprotobuf318 migration seems to have finished and this is holding back protobuf+python 3.10

[github-actions]

Hi! This is the friendly conda-forge automerge bot!

I considered the following status checks when analyzing this PR:

• linter: passed
• azure: passed

Thus the PR was passing and merged! Have a great day!

[hmaarrfk]

Thank you!