Update TagBot.yml

[simonbyrne]

PULL REQUEST

Use DOCUMENTER_KEY for TagBot

Purpose and Content

Previously the tags created by TagBot were not triggering the Documenter builds
https://github.com/JuliaRegistries/TagBot/blob/master/README.md#ssh-deploy-keys

Benefits and Risks

Builds docs on tags

Linked Issues

(Provide references to any link issues. Use closes #issuenum to automatically close an open issue)

• Fixes #
• Closes #

PR Checklist

• This PR has a corresponding issue OR is linked to an SDI.
• I have followed CliMA's codebase contribution and style guidelines OR N/A.
• I have followed CliMA's documentation policy.
• I have checked all issues and PRs and I certify that this PR does not duplicate an open PR.
• Unit tests are included OR N/A.
• Code used in an integration test OR N/A.
• All tests ran successfully on my local machine OR N/A.
• All classes, modules, and function contain appropriate docstrings OR N/A.
• Documentation has been added/updated OR N/A.

[odunbar]

LGTM - I'll add this to CES and RF packages as well.

[odunbar]

bors r+

[bors]

Build succeeded:

• docs-build
• format
• test_success