replace github.event expressions with env variables in telegram-bot workflow

[dumitory-dev]

Description

Replace direct ${{ github.event.* }} expressions in the run block with
environment variables to prevent potential script injection.

How Has This Been Tested?

If your pull request does not include new tests for this change, please describe:

• How to reproduce unwanted behaviour without this fix
• How to make sure your change fixes this unwanted behaviour
• What environment have you been using for your tests

Checklist:

• My code follows the PEP 8
• I have performed a self-review of my own code
• I have commented my code, particularly in 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 fix is effective or that my feature works
• New and existing tests pass locally with my changes
• Any dependent changes have been merged and published in downstream modules

[dumitory-dev]

test