chore(ci): add condition to check if analytics workflow is running on main repo

[dreamorosi]

Description of your changes

This PR introduces a conditional statement in the GitHub analytics workflow that we use to collect metics about the repository. This workflow should run only in this repo, however prior to this PR, the workflow was running and failing also on forks of the repo.

This PR adds a check to the scheduled workflow that will cause the workflow to end in case the repo name is not the main one.

Related issues, RFCs

Issue number: #1438

Checklist

• My changes meet the tenets criteria
• I have performed a self-review of my own code
• I have commented my code where necessary, particularly in areas that should be flagged with a TODO, or hard-to-understand areas
• I have made corresponding changes to the documentation
• My changes generate no new warnings
• I have added tests that prove my change is effective and works
• The PR title follows the conventional commit semantics

Breaking change checklist

Is it a breaking change?: NO

• I have documented the migration process
• I have added, implemented necessary warnings (if it can live side by side)

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