[chore] Fixed a dead link for machine id man page

[gyliu513]

Fixes #

Changes

This is fixing a CI error here https://github.com/open-telemetry/semantic-conventions/actions/runs/11861560247/job/33059139725?pr=1574

@lmolkova ^^

Please provide a brief description of the changes here.

Note: if the PR is touching an area that is not listed in the existing areas, or the area does not have sufficient domain experts coverage, the PR might be tagged as experts needed and move slowly until experts are identified.

Merge requirement checklist

• CONTRIBUTING.md guidelines followed.
• Change log entry added, according to the guidelines in When to add a changelog entry.
  • If your PR does not need a change log, start the PR title with [chore]
• schema-next.yaml updated with changes to existing conventions.

[trask]

hi @gyliu513! it looks like you need to also update it in the yaml file

[gyliu513]

@trask which yaml file you are mentioning, can you point that out? Thanks!

[trask]

oh, looks like it's in 3 places: https://github.com/search?q=repo%3Aopen-telemetry%2Fsemantic-conventions+freedesktop&type=code

[gyliu513]

@trask done, thanks!