docs(providers): OAuth wording typo in self-hosted GitLab setup

Description

The self-hosted GitLab OAuth section on the Providers docs page has a small copy error. The sentence reads In order to make Oauth working for your self-hosted instance...:

• Oauth should be OAuth — every other mention in the page (including the heading directly above it, "OAuth for Self-Hosted instances") uses the correct OAuth casing.
• make Oauth working is ungrammatical; it should read make OAuth work.

Source: packages/web/src/content/docs/providers.mdx (self-hosted GitLab OAuth section). Page: https://opencode.ai/docs/providers

Plugins

None

OpenCode version

n/a (documentation)

Steps to reproduce

1. Open the Providers documentation page.
2. Go to the self-hosted GitLab "OAuth for Self-Hosted instances" section.
3. Note In order to make Oauth working for your self-hosted instance....

Screenshot and/or share link

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Operating System

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Terminal

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