update readme

README.en.md

@@ -52,6 +52,6 @@ For all sections involving random number generators, custom parameters for rando
 def rnd_fn(n: int) -> bytes: ...
 ```
 
-If no random number generator is passed, the default system-related random number generator is used. On Windows, it utilizes `BCryptGenRandom`, while other systems use `/dev/urandom` for implementation, which is similar to the Python standard library function `os.urandom`.
+If no random number generator is passed, the default system-related random number generator is used. On Windows, it utilizes `BCryptGenRandom`, while other systems use `/dev/urandom` for implementation, which is similar to the Python standard library function [`os.urandom`](https://docs.python.org/3/library/os.html#os.urandom).
 
 For specific implementation details, refer to [random.c](https://github.com/ww-rm/gmalglib/blob/main/src/gmalglib/core/random.c) under the `OsRandomProc` function.

README.md

@@ -55,6 +55,6 @@ print(gmalglib.sm3_digest(b"messagedigest").hex())
 def rnd_fn(n: int) -> bytes: ...
 ```
 
-如不传入随机数发生器, 则使用默认的系统相关随机数发生器, 在 Windows 下使用 `BCryptGenRandom`, 其余系统使用 `/dev/urandom` 实现, 其实现类似于 Python 标准库函数 `os.urandom`.
+如不传入随机数发生器, 则使用默认的系统相关随机数发生器, 在 Windows 下使用 `BCryptGenRandom`, 其余系统使用 `/dev/urandom` 实现, 其实现类似于 Python 标准库函数 [`os.urandom`](https://docs.python.org/3/library/os.html#os.urandom).
 
 具体实现见 [random.c](https://github.com/ww-rm/gmalglib/blob/main/src/gmalglib/core/random.c) 内 `OsRandomProc`.