Update DeckyClash to 1.2.1

[chenx-dust]

Update DeckyClash to 1.2.1

• Fix Geo files issue
• Fix several bugs in YAML editor
• Add local file upload in external importer

Task Checklist

Developer

• I am the original author or an authorized maintainer of this plugin.
• I have abided by the licenses of the libraries I am utilizing, including attaching license notices where appropriate.

Plugin

• I have verified that my plugin works properly on the Stable and Beta update channels of SteamOS.
• I have verified my plugin is unique or provides more/alternative functionality to a plugin already on the store.

Backend

• No: I am using a custom backend other than Python.
• Yes: I am using a tool or software from a 3rd party FOSS project that does not have it's dependencies statically linked.
• No: I am using a custom binary that has all of it's dependencies statically linked.

Community

• I have tested and left feedback on two other pull requests for new or updating plugins.
• I have commented links to my testing report in this PR.

Testing

• Tested by a third party on SteamOS Stable or Beta update channel.

[github-actions]

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[Copilot]

Pull request overview

This PR updates the DeckyClash plugin from version 1.2.0 to version 1.2.1 by pointing to a new commit in the plugin's repository.

Changes:

• Updated the subproject commit reference for DeckyClash plugin

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[RodoMa92]

I already took a look at the code and it looks fine at a first glance, but please include a short summary with the changes in your PR, for consistency. Thanks.

[RodoMa92]

Code looks fine to me, but I would like another opinion from another dev.

[beebls]

LGTM aswell