Updated notify_slack method

[ashiramin]

Fixes

Fixes #4884

Description

• notify_slack method now determines dag_id through context variables

Testing Instructions

Checklist

• My pull request has a descriptive title (not a vague title likeUpdate index.md).
• My pull request targets the default branch of the repository (main) or a parent feature branch.
• My commit messages follow best practices.
• My code follows the established code style of the repository.
• I added or updated tests for the changes I made (if applicable).
• I added or updated documentation (if applicable).
• I tried running the project locally and verified that there are no visible errors.
• I ran the DAG documentation generator (ov just catalog/generate-docs for catalog
  PRs) or the media properties generator (ov just catalog/generate-docs media-props
  for the catalog or ov just api/generate-docs for the API) where applicable.

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[krysal]

Hey @ashiramin 👋 Could you fill out the PR template here? It would be helpful to know what you're working on so we can better guide you. I'm guessing you're targeting #4884.

It's failing the linter, you can see the error running the command:

./ov just lint

Add those changes, commit and it should pass.

[krysal]

@ashiramin, can you continue working on this? Let us know if anything is blocking you.

[ashiramin]

@ashiramin, can you continue working on this? Let us know if anything is blocking you.

@krysal I'm sorry I had some local dev issues unrelated to this project. I got it all fixed up so I'll work on it next week.

Thanks for reaching out

[dhruvkb]

The changes look good to me! Thanks for your contribution @ashiramin.

[ashiramin]

@dhruvkb is this good to be merged?

[dhruvkb]

LGTM, thanks for the contribution @ashiramin!

[krysal]

Great, I confirmed the function continues to work for one of the affected DAGs.

Thank you, @ashiramin!