fix(metadata): correct Cargo.toml license MIT -> MPL-2.0

The actual LICENSE file in the repository has always been the Mozilla
Public License 2.0, matching the rest of the sudo-bot actions family.
Cargo.toml's license field claimed MIT, which was a metadata error.
No code change; aligns crates.io and dependency-tree license reporting
with the file.

Generated with [Claude Code](https://claude.ai/code)
via [Happy](https://happy.engineering)

Co-Authored-By: Claude <noreply@anthropic.com>
Co-Authored-By: Happy <yesreply@happy.engineering>

Author: 3 people

CHANGELOG.md

@@ -6,6 +6,12 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 ## [Unreleased]
 
+### Fixed
+- `Cargo.toml`'s `license` field said `MIT` while the actual `LICENSE`
+  file in the repository (and the rest of the `sudo-bot` actions
+  family) is the Mozilla Public License 2.0. Corrected the metadata
+  to match: `license = "MPL-2.0"`. No code change.
+
 ### Added
 - Gitea self-hosted support. The action auto-detects Gitea Actions (via
   the `GITEA_ACTIONS=true` env var the runner sets, or a `/api/v1` suffix

Cargo.toml

@@ -4,7 +4,7 @@ version = "2.0.0"
 edition = "2021"
 authors = ["williamdes"]
 description = "GitHub Action to merge a pull-request, written in Rust"
-license = "MIT"
+license = "MPL-2.0"
 readme = "README.md"
 repository = "https://github.com/sudo-bot/action-pull-request-merge"