doc: adding kevin uehara as collaborator

[kevinuehara]

In this PR I'm adding kevinuehara as colloaborator of node

Contribution: #54929

[aduh95]

Hello, please see the GOVERNANCE document regarding how one can become a collaborator. It's the one case where the project requires an issue before opening a PR.

node/GOVERNANCE.md

Lines 130 to 180 in bc39796

	### Who can nominate Collaborators?
	Existing Collaborators can nominate someone to become a Collaborator.
	### Ideal Nominees
	Nominees should have significant and valuable contributions across the Node.js
	organization.
	Contributions can be:
	* Opening pull requests.
	* Comments and reviews.
	* Opening new issues.
	* Participation in other projects, teams, and working groups of the Node.js
	organization.
	### Nominating a new Collaborator
	To nominate a new Collaborator, open an issue in the [nodejs/node][] repository.
	Provide a summary of the nominee's contributions. For example:
	* Commits in the [nodejs/node][] repository.
	* Use the link `https://github.com/nodejs/node/commits?author=GITHUB_ID`
	* Pull requests and issues opened in the [nodejs/node][] repository.
	* Use the link `https://github.com/nodejs/node/issues?q=author:GITHUB_ID`
	* Comments on pull requests and issues in the [nodejs/node][] repository
	* Use the link `https://github.com/nodejs/node/issues?q=commenter:GITHUB_ID`
	* Reviews on pull requests in the [nodejs/node][] repository
	* Use the link `https://github.com/nodejs/node/pulls?q=reviewed-by:GITHUB_ID`
	* Help provided to end-users and novice contributors
	* Pull requests and issues opened throughout the Node.js organization
	* Use the link `https://github.com/search?q=author:GITHUB_ID+org:nodejs`
	* Comments on pull requests and issues throughout the Node.js organization
	* Use the link `https://github.com/search?q=commenter:GITHUB_ID+org:nodejs`
	* Participation in other projects, teams, and working groups of the Node.js
	organization
	* Other participation in the wider Node.js community
	Mention @nodejs/collaborators in the issue to notify other collaborators about
	the nomination.
	The nomination passes if no collaborators oppose it after one week. In the case
	of an objection, the TSC is responsible for working with the individuals
	involved and finding a resolution.
	There are steps a nominator can take in advance to make a nomination as
	frictionless as possible. To request feedback from other collaborators in
	private, use the [collaborators discussion page][]
	(which only collaborators may view). A nominator may also work with the
	nominee to improve their contribution profile.

Note that the governance document uses "contributions" (plural), you're linking to a single one, you're more likely to be nominated if you make several contributions. But if you disagree, the last sentence is rellevant:

node/GOVERNANCE.md

Lines 182 to 184 in bc39796

	Collaborators might overlook someone with valuable contributions. In that case,
	the contributor may open an issue or contact a collaborator to request a
	nomination.