Link to "in development standards" on doc site is broken

[riziles]

First Check

• I added a very descriptive title here.
• I used the GitHub search to find a similar question and didn't find it.
• I searched the SQLModel documentation, with the integrated search.
• I already searched in Google "How to X in SQLModel" and didn't find any information.
• I already read and followed all the tutorial in the docs and didn't find an answer.
• I already checked if it is not related to SQLModel but to Pydantic.
• I already checked if it is not related to SQLModel but to SQLAlchemy.

Commit to Help

• I commit to help with one of those options 👆

Example Code

SQLModel even adopts currently 
[in development standards](https://github.com/microsoft/pyright/blob/main/specs/dataclass_transforms.md)
for Python type annotations to ensure the best developer experience, so you will
get inline errors and autocompletion even while creating new model instances.

Description

The link on the doc site "features" page referencing in development standards returns a 404. I think that it should point here instead: https://peps.python.org/pep-0681/ .

Operating System

Windows

Operating System Details

This issue is not OS specific.

SQLModel Version

0.0.14

Python Version

3.10

Additional Context

The docs site is amazing. I just want to help make it better.

[YuriiMotov]

Fixed