Update the update_plugin_provider method and docs

[charlesLoder]

Closes #25

Goes beyond fixing the typo, and updates the update_plugin_provider method

[Copilot]

Pull Request Overview

This PR updates the update_plugin_provider method signature to remove the redundant provider parameter and updates documentation to reflect the change. The method now implicitly uses this instead of requiring the provider instance to be passed as a parameter.

• Remove provider parameter from update_plugin_provider method since it always passes this
• Update documentation examples to use the simplified method call
• Fix code block language from typescript to tsx in documentation

Reviewed Changes

Copilot reviewed 3 out of 3 changed files in this pull request and generated 1 comment.

File	Description
src/plugin/base_provider.tsx	Updates method signature to remove provider parameter and use implicit this
src/providers/userTokenProvider/index.tsx	Updates method call to use new signature without parameter
stories/docs/creating-a-provider.mdx	Updates documentation examples and fixes code block language

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