Fix support status for 'uv' Security Updates for package manager

[ferdlestier]

This pull request updates the documentation for supported package managers by marking uv as supported for the pip ecosystem, instead of not supported.Since the announcement of this feature in the Blog post Security Updates for the uv package-ecosystem is now supported.

This Pull Request aims to update the public documentation to reflect the latest changes to Supportablity

Why:

This pull request updates the documentation for supported package managers by marking uv as supported for the pip ecosystem, instead of not supported.Since the announcement of this feature in the Blog post Security Updates for the uv package-ecosystem is now supported.

This Pull Request aims to update the public documentation to reflect the latest changes to Supportablity
Closes:

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

Currently the public documentation states that Security Updates are not supported for the uv package-ecosystem:

Since Dec 16th Security Updates is indeed supported, as per this Blog post.

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/dependabot/ecosystems-supported-by-dependabot/supported-ecosystems-and-repositories.md	fpt ghec ghes@ 3.19 3.18 3.17 3.16 3.15 3.14	fpt ghec ghes@ 3.19 3.18 3.17 3.16 3.15 3.14	from reusable

Key: fpt: Free, Pro, Team; ghec: GitHub Enterprise Cloud; ghes: GitHub Enterprise Server

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Pull request overview

This pull request updates the Dependabot supported package managers documentation to reflect that the uv package manager now supports Security Updates, based on a feature announcement.

Key Changes

• Updates the Security Updates column for uv from "Not supported" to "Supported" in the package manager support table

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