feat: Update package.json to 1.4.12

Commit by [GitHub Actions](https://github.com/Cysharp/ZLinq/actions/runs/15750633711)

Author: github-actions[bot]

src/ZLinq.Unity/Assets/ZLinq.Unity/package.json

@@ -2,7 +2,7 @@
  "name": "com.cysharp.zlinq",
  "displayName": "ZLinq",
  "author": { "name": "Cysharp, Inc.", "url": "https://cysharp.co.jp/en/" },
- "version": "1.4.11",
+ "version": "1.4.12",
  "unity": "2021.3",
  "description": "Zero allocation LINQ with Span and LINQ to SIMD, LINQ to Tree(FileSystem, GameObject, etc...) for all .NET platforms and Unity.",
  "keywords": [ "LINQ" ],