Point links at OpenVoxProject repos where an equivalent exists, and fix a stale master branch reference

[miharp]

Summary

Some pages link to github.com/puppetlabs/* repositories that OpenVoxProject now maintains its own copy of, and one link to an OpenVoxProject repo uses a branch that no longer exists. Found while adding lang_data_uri (#411), which originally cited the specification at puppetlabs/puppet-specifications.

1. Branch reference that only works by redirect

OpenVoxProject/puppet-specifications has no master branch — its default is main, and it is a detached repo rather than a GitHub fork.

• docs/_openvox-server_8x/puppet-api/v3/compile.markdown:6 — /blob/master/language/data-types/pcore-generic-data.md returns 302. Should be /blob/main/.

OpenVoxProject/openvox also defaults to main, so any /blob/master/ link to it has the same issue.

2. Links with an OpenVoxProject equivalent

Each target below was checked to exist in the OpenVoxProject org:

File	Currently links to	OpenVox equivalent
_openvox_8x/lang_expressions.markdown:26	puppetlabs/puppet-specifications	OpenVoxProject/puppet-specifications
_openvoxdb_8x/api/query/v4/query.markdown:103	puppetlabs/puppet-specifications/blob/master/...	same repo, /blob/main/
_openvox_8x/provider_development.markdown	puppetlabs/puppet/blob/master/lib/puppet/feature/libuser.rb	OpenVoxProject/openvox/blob/main/... (path confirmed present)
_openvox_8x/config_file_auth.markdown	puppetlabs/puppet/blob/4.3.0/conf/auth.conf	OpenVoxProject/openvox carries the full history, including tag 4.3.0
_openvox_8x/yard/index.md	puppetlabs/puppet	OpenVoxProject/openvox
_ecosystem_8x/devkit/jig.md (x2)	puppetlabs/puppet-resource_api	OpenVoxProject/puppet-resource_api
_openvoxdb_8x/pdb_support_guide.markdown	puppetlabs/stockpile	OpenVoxProject/stockpile
_openvoxdb_8x/release_notes.markdown	puppetlabs/trapperkeeper/wiki/...	OpenVoxProject/trapperkeeper (wiki may not be mirrored, needs checking)

Two judgement calls for whoever picks this up:

• release_notes.markdown is a historical record. Rewriting links inside past release notes may be undesirable even when an equivalent exists.
• config_file_auth.markdown pins tag 4.3.0 deliberately. The tag does exist in OpenVoxProject/openvox, so the switch is safe, but the intent is to show historical content and that should be preserved.

Explicitly out of scope

• The 24 puppetlabs/bolt links are all in _openbolt_5x, which is generated from the upstream openbolt repo. Editing them here would be overwritten on the next regeneration; the fix belongs upstream. See docs: fix broken internal links in the openbolt collection #289 for the related openbolt link work.
• Links to projects with no OpenVoxProject equivalent should stay as they are: rspec-puppet, r10k, puppet-lint, puppetlabs_spec_helper, control-repo, docs-archive, and the Forge modules (puppetlabs-stdlib, puppetlabs-ntp, puppetlabs-mysql, and so on).

How this was checked

# every puppetlabs repo linked from docs/
grep -rhoE 'https://github\.com/puppetlabs/[A-Za-z0-9._-]+' docs/ | sed 's|.*/||' | sort | uniq -c | sort -rn

# compare against the OpenVoxProject org
gh api /orgs/OpenVoxProject/repos --paginate -q '.[].name' | sort