Incorrect URL for Github Copilot API

Description

This issue appears on Windows machine: once installed, the authentication to the Github copilot works (auth list command confirms that) however opencode itself is trying to connect to the copilot-api.github.com site, which is incorrect.
This affects VSCode extension, terminal and Windows application running on the same PC.

The fix:

• replace content of opencode.jsonc file located in .../.config/opencode/ directory with this one:
  { "$schema": "https://opencode.ai/config.json", "autoupdate": false, "provider": { "github-copilot": { "options": { "baseURL": "https://api.githubcopilot.com" } } } }

Plugins

None

OpenCode version

1.18.23 also tested on 1.18.20

Steps to reproduce

1. Open PowerShell.
2. install Node.JS f not present (npm command won't work otherwise)
3. Run npm install -g opencode-ai
4. Connect to the gihub copilot (generate the code and open https://github.com/login/device to authenticate)
5. Open opencode and try any command. You will get an error "Cannot connect to API: was there a typo in the url or port?"

Screenshot and/or share link

No response

Operating System

Windows 11

Terminal

Windows PowerShell 7

Reproduce the failure with OpenCode 1.18.23 on Windows PowerShell using the listed npm installation and GitHub Copilot authentication steps. Compare the github-copilot provider's default endpoint with the baseURL shown in opencode.jsonc; done means OpenCode connects to https://api.githubcopilot.com without requiring that manual override.