Add Mix to Dependency Submission premade action table

[maennchen]

Why:

With the new mix-dependency-submission action, the Elixir ecosystem is also supported for dependency submission. Link it here so that people can find it.

Closes: no issue created

What's being changed (if available, include any code snippets, screenshots, or gifs):

• Add entry to table in data/reusables/dependency-submission/premade-action-table.md.
• Change will be visible at: https://docs.github.com/en/code-security/supply-chain-security/understanding-your-software-supply-chain/dependency-graph-supported-package-ecosystems#package-ecosystems-supported-via-dependency-submission-actions

Check off the following:

• A subject matter expert (SME) has reviewed the technical accuracy of the content in this PR. In most cases, the author can be the SME. Open source contributions may require an SME review from GitHub staff.
• The changes in this PR meet the docs fundamentals that are required for all content.
• All CI checks are passing and the changes look good in the review environment.

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Source	Review	Production	What Changed
code-security/supply-chain-security/understanding-your-software-supply-chain/dependency-graph-supported-package-ecosystems.md	fpt ghec ghes@ 3.16 3.15 3.14 3.13 3.12	fpt ghec ghes@ 3.16 3.15 3.14 3.13 3.12	from reusable

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[Copilot]

Pull Request Overview

This pull request adds support for dependency submission in the Elixir ecosystem by including a new entry for mix-dependency-submission in the premade action table.

• Adds a new row for Mix (Elixir) to the table in data/reusables/dependency-submission/premade-action-table.md.
• Updates the link to point to the marketplace action for Mix dependency submission.

[Copilot]

Pull Request Overview

This PR adds support for the Elixir ecosystem by including a new Mix Dependency Submission action to the dependency submission premade action table.

• Adds a new table entry for Mix (Elixir) with a marketplace link.
• Updates the premade actions table in the documentation to reflect the new dependency submission action.

Comments suppressed due to low confidence (1)

data/reusables/dependency-submission/premade-action-table.md:7

• [nitpick] Consider renaming the entry label from 'Mix (Elixir)' to 'Mix' to maintain consistency with the naming convention used for the other dependency submission actions.

+Mix (Elixir) | [Mix Dependency Submission](https://github.com/marketplace/actions/mix-dependency-submission) |

[Sharra-writes]

Thanks for opening a PR! I'll get this triaged for review.

[ahpook]

Thanks for the contribution, LGTM! 👍

[Sharra-writes]

Looks like everything is in order! I'll get this merged once checks are passing. Thanks for the contribution!

[github-actions]

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