Add Quoter Mk2 plugin URL to channel.json

[deoxify]

This is a

• New plugin.
• Update to an existing plugin.

Plugin name and version: quotermk2 (v1.0.0)

Plugin source code zip file: https://github.com/deoxify/micro-quotermk2/archive/v1.0.0.zip

Checklist:

• Plugin has a repo.json listing the Name, Description, Website, and License.
• I have read the instructions at https://github.com/micro-editor/plugin-channel#adding-your-own-plugin.

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Description

quotermk2 is an enhanced version of the original quoter plugin. Unlike quoter, which blindly wraps the selected text in quotes, quotermk2 intelligently toggles the quoting of the selection: it adds quotes when the text is unquoted and removes them when the text is already quoted.