fix: Update publishing job to only trigger if git repo is assocaited …

…to the upstream repo (#1830)

## Description

Experiencing the publishing job getting triggered when using the main
branch in forks. Adding an additional condition to the job to only
trigger if the workflow is being run within the upstream repository.


https://docs.github.com/en/actions/learn-github-actions/contexts#github-context

## Pipeline Reference

<!-- Insert your Pipeline Status Badge below -->

Pipeline run with context set to my fork

https://github.com/oZakari/bicep-registry-modules/actions/runs/8930012279

Pipeline with context set to Azure org

https://github.com/oZakari/bicep-registry-modules/actions/runs/8930022963

## Type of Change

<!-- Use the check-boxes [x] on the options that are relevant. -->

- [x] Update to CI Environment or utlities (Non-module effecting
changes)
- [ ] Azure Verified Module updates:
- [ ] Bugfix containing backwards compatible bug fixes, and I have NOT
bumped the MAJOR or MINOR version in `version.json`:
- [ ] Someone has opened a bug report issue, and I have included "Closes
#{bug_report_issue_number}" in the PR description.
- [ ] The bug was found by the module author, and no one has opened an
issue to report it yet.
- [ ] Feature update backwards compatible feature updates, and I have
bumped the MINOR version in `version.json`.
- [ ] Breaking changes and I have bumped the MAJOR version in
`version.json`.
  - [ ] Update to documentation

## Checklist

- [x] I'm sure there are no other open Pull Requests for the same
update/change
- [ ] I have run `Set-AVMModule` locally to generate the supporting
module files.
- [x] My corresponding pipelines / checks run clean and green without
any errors or warnings

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.github/workflows/avm.template.module.yml

@@ -141,6 +141,7 @@ jobs:
     runs-on: ubuntu-latest
     # Note: Below always() required in condition due to psrule jobs being skipped for ptn modules not having defaults or waf-aligned folders
     if: github.ref == 'refs/heads/main' &&
+      github.repository	 == 'Azure/bicep-registry-modules' &&
       always() &&
       needs.job_module_static_validation.result == 'success' &&
       needs.job_module_deploy_validation.result == 'success'