Add link to 64bits and hdf coding guide

Signed-off-by: Naqxyjay <zhangchunxin@huawei.com>

zh-cn/contribute/贡献代码.md

@@ -22,6 +22,8 @@
 -   [Python语言编程规范](https://pep8.org/)
 -   [C&C++语言安全编程指南](OpenHarmony-c-cpp-secure-coding-guide.md)
 -   [Java语言安全编程指南](OpenHarmony-Java-secure-coding-guide.md)
+-   [32/64位可移植编程规范](OpenHarmony-64bits-coding-guide.md)
+-   [HDF驱动编程规范](OpenHarmony-hdf-coding-guide.md)
 -   [Log打印规范](OpenHarmony-Log-guide.md)
 
 ### 开源软件引入