fix: use Bearer instead of token in authorization headers

[risu729]

Bearer is the standard prefix, and token is the legacy GitHub-specific prefix.
Both GitHub and Forgejo support the Bearer prefix.

[Copilot]

Pull request overview

This PR updates authorization headers across the codebase to use the standard OAuth 2.0 Bearer token format instead of GitHub's legacy token format. The changes ensure consistency with modern API authentication practices and improve code quality by using typed header constants.

• Replaces Authorization: token {token} with Authorization: Bearer {token} for GitHub, Forgejo, and related APIs
• Standardizes on using reqwest::header::AUTHORIZATION constant instead of string literals
• Updates both Rust code and shell scripts to maintain consistency

Reviewed changes

Copilot reviewed 5 out of 5 changed files in this pull request and generated no comments.

Show a summary per file

File	Description
src/http.rs	Updated GitHub API authentication from token to Bearer format and replaced string literal with reqwest::header::AUTHORIZATION constant
src/github.rs	Applied same authentication format changes for GitHub API calls
src/forgejo.rs	Updated Forgejo API authentication from token to Bearer format
src/gitlab.rs	Changed to use reqwest::header::AUTHORIZATION constant (already was using Bearer)
.github/actions/fetch-token/action.yml	Updated curl command to use Bearer format for GitHub API validation

---

💡 Add Copilot custom instructions for smarter, more guided reviews. Learn how to get started.