docs: fix link with relative

[m9810223]

e.g.

• https://docs.pydantic.dev/dev-v2/usage/pydantic_settings/#environment-variable-names
  • Check the Field aliases documentation for more information about aliases

[codecov-commenter]

Codecov Report

Patch and project coverage have no change.

Comparison is base (39383a3) 97.42% compared to head (e54aa86) 97.42%.

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Additional details and impacted files

@@           Coverage Diff           @@
##             main      #85   +/-   ##
=======================================
  Coverage   97.42%   97.42%           
=======================================
  Files           5        5           
  Lines         311      311           
  Branches       68       68           
=======================================
  Hits          303      303           
  Misses          6        6           
  Partials        2        2           

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[hramezani]

Thanks @m9810223