change old pydantic docs url

[Abdeldjalil-H]

Description

This simple PR changes the old pydantic docs urls to the new ones.

Checklist:

• My code follows the code style of this project.
• My change requires a change to the documentation.
• I have updated the documentation accordingly.
• I have added the changelog accordingly.
• I have read the CONTRIBUTING document.
• I have added tests to cover my changes.
• All new and existing tests passed.

[coveralls]

Pull Request Test Coverage Report for Build 11883084224

Details

• 0 of 0 changed or added relevant lines in 0 files are covered.
• No unchanged relevant lines lost coverage.
• Overall coverage remained the same at 89.269%

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Totals
Change from base Build 11881509020:	0.0%
Covered Lines:	6211
Relevant Lines:	6840

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💛 - Coveralls