Fixed contributors.yml script to run optimally

[ayn-aval]

What kind of change does this PR introduce?

• Added a condition to exclude PRs created by github-actions[bot]

Issue Number:

• Fixes contributors.yml script is behaving unexpectedly. #137

Summary

Now the workflow will:

• Run on push to main
• Run when a genuine user's PR is merged
• Run on schedule (weekly on Mondays at 2 AM)
• Run on manual dispatch
• NOT run when the bot's own PR is merged (preventing the loop)

Does this PR introduce a breaking change?

• No

Have you read the contributing guide , README.md , code of conduct?

• Yes

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[may-tas]

@ayn-aval LGTM, merging.

[ayn-aval]

Thank you @may-tas.