ci: skip scheduled and release workflows on forks

[batmnnn]

Summary

• Add if: github.repository == 'boa-dev/boa' to Security audit, Nightly Build, Update Test262 Results, CodeQL, and Publish Release jobs
• Prevents forks with Actions enabled from running workflows that require upstream secrets (DATA_PAT, registry tokens) or write permissions, which currently fail and spam contributors with notifications

Test plan

• Confirm jobs still run on boa-dev/boa (condition evaluates true)
• On a fork with Actions enabled, these workflows should show as skipped rather than failed

Made with Cursor

[Copilot]

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[github-actions]

Test262 conformance changes

Test result	main count	PR count	difference
Total	53,125	53,125	0
Passed	51,073	51,073	0
Ignored	1,482	1,482	0
Failed	570	570	0
Panics	0	0	0
Conformance	96.14%	96.14%	0.00%

Tested main commit: 4fc75c6ae9d85f2b8065c6716f88e9b35318438c
Tested PR commit: 22fd5dc86780b4f055e642108f515f84aca3b8c1
Compare commits: 4fc75c6...22fd5dc

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 62.88%. Comparing base (6ddc2b4) to head (22fd5dc).
⚠️ Report is 1012 commits behind head on main.

Additional details and impacted files

@@             Coverage Diff             @@
##             main    #5467       +/-   ##
===========================================
+ Coverage   47.24%   62.88%   +15.63%     
===========================================
  Files         476      530       +54     
  Lines       46892    59102    +12210     
===========================================
+ Hits        22154    37165    +15011     
+ Misses      24738    21937     -2801     

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