bump version

Author: jiacai2050

README.md

@@ -43,11 +43,9 @@ The **current** version of the Zig Cookbook is based on [zine-ssg](https://zine-
 
 # Star History
 
-```=html
-<a href="https://star-history.com/#zigcc/zig-cookbook&Date">
-  <img src="https://api.star-history.com/svg?repos=zigcc/zig-cookbook&type=Date" alt="Star History">
-</a>
-```
+## Star History
+
+[![Star History Chart](https://api.star-history.com/svg?repos=zigcc/zig-cookbook&type=Date)](https://www.star-history.com/#zigcc/zig-cookbook&Date)
 
 # License
 

src/en-US/index.smd

@@ -24,7 +24,7 @@
 
 [Zig cookbook](https://github.com/zigcc/zig-cookbook) is a collection of simple Zig programs that demonstrate good practices to accomplish common programming tasks.
 
-> - Main branch tracks Zig 0.14.0 and master, and are tested on Linux and macOS via GitHub actions.
+> - Main branch tracks Zig 0.15.x, and is tested on Linux and macOS via GitHub actions.
 > - Earlier Zig support could be found in [other branches](https://github.com/zigcc/zig-cookbook/branches).
 
 # How to use

src/zh-CN/index.smd

@@ -24,7 +24,7 @@
 
 [Zig Cookbook](https://github.com/zigcc/zig-cookbook) 是一系列简单的 Zig 程序集合，用于展示完成常见编程任务的最佳实践。
 
-> - 主分支跟踪 Zig 0.14.0 及 master 版本，并通过 GitHub Actions 在 Linux 和 macOS 上进行测试。
+> - 主分支跟踪 Zig 0.15.x 版本，并通过 GitHub Actions 在 Linux 和 macOS 上进行测试。
 > - 更早版本的 Zig 支持可在 [其他分支](https://github.com/zigcc/zig-cookbook/branches) 中找到。
 
 # 如何使用