Use links to latest CPython stable release in docs (#5366)

* Use links to latest CPython stable release in docs

* fix link to CPython github

Author: ngoldbaum

Architecture.md

@@ -37,7 +37,7 @@ automated tooling because:
   - it gives us best control about how to adapt C conventions to Rust, and
   - there are many Python interpreter versions we support in a single set of files.
 
-We aim to provide straight-forward Rust wrappers resembling the file structure of [`cpython/Include`](https://github.com/python/cpython/tree/3.13/Include).
+We aim to provide straight-forward Rust wrappers resembling the file structure of [`cpython/Include`](https://github.com/python/cpython/tree/main/Include).
 
 We are continuously updating the module to match the latest CPython version which PyO3 supports (i.e. as of time of writing Python 3.13). The tracking issue is [#1289](https://github.com/PyO3/pyo3/issues/1289), and contribution is welcome.
 

guide/src/function.md

@@ -95,9 +95,9 @@ The `#[pyo3]` attribute can be used to modify properties of the generated Python
     ```
   - <a id="warn"></a> `#[pyo3(warn(message = "...", category = ...))]`
 
-    This option is used to display a warning when the function is used in Python. It is equivalent to [`warnings.warn(message, category)`](https://docs.python.org/3.13/library/warnings.html#warnings.warn). 
-    The `message` parameter is a string that will be displayed when the function is called, and the `category` parameter is optional and has to be a subclass of [`Warning`](https://docs.python.org/3.12/library/exceptions.html#Warning). 
-    When the `category` parameter is not provided, the warning will be defaulted to [`UserWarning`](https://docs.python.org/3.12/library/exceptions.html#UserWarning).
+    This option is used to display a warning when the function is used in Python. It is equivalent to [`warnings.warn(message, category)`](https://docs.python.org/3/library/warnings.html#warnings.warn). 
+    The `message` parameter is a string that will be displayed when the function is called, and the `category` parameter is optional and has to be a subclass of [`Warning`](https://docs.python.org/3/library/exceptions.html#Warning). 
+    When the `category` parameter is not provided, the warning will be defaulted to [`UserWarning`](https://docs.python.org/3/library/exceptions.html#UserWarning).
 
     > Note: when used with `#[pymethods]`, this attribute does not work with `#[classattr]` nor `__traverse__` magic method.