fix: cargo include

[vvanglro]

When referring to pydantic-core, I found that the include path in the cargo.toml file is wrong.

I run cargo package --list and it's not included. So it should include the python folder?

Selected Reviewer: @samuelcolvin

[vvanglro]

please review

[codecov]

Codecov Report

Merging #852 (d7dc8cb) into main (ca1055b) will not change coverage.
The diff coverage is n/a.

Additional details and impacted files

@@           Coverage Diff           @@
##             main     #852   +/-   ##
=======================================
  Coverage   93.52%   93.52%           
=======================================
  Files         102      102           
  Lines       14609    14609           
  Branches       25       25           
=======================================
  Hits        13663    13663           
  Misses        940      940           
  Partials        6        6           

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[codspeed-hq]

CodSpeed Performance Report

Merging #852 will degrade performances by 46.09%

_{Comparing vvanglro:fix/cargo_include (d7dc8cb) with main (ca1055b)}

Summary

🔥 7 improvements
❌ 8 regressions
✅ 120 untouched benchmarks

⚠️ Please fix the performance issues or acknowledge them on CodSpeed.

Benchmarks breakdown

	Benchmark	main	vvanglro:fix/cargo_include	Change
❌	test_core_python_fs	235.3 µs	264.9 µs	-11.18%
❌	test_core_string_lax_wrong	40 µs	59.6 µs	-32.91%
🔥	test_core_python	46 µs	41.1 µs	+11.81%
❌	test_core_future_str	26.8 µs	30.1 µs	-10.95%
🔥	test_core_future	53.5 µs	42.7 µs	+25.32%
🔥	test_date_from_str	25.8 µs	22.9 µs	+12.71%
🔥	test_date_from_datetime	38.8 µs	35.2 µs	+10.51%
🔥	test_core_future_str	25.4 µs	22.9 µs	+10.99%
❌	test_core_python	41.6 µs	46.7 µs	-10.8%
❌	test_dont_raise_error	25.5 µs	38 µs	-32.99%
❌	test_dont_raise_error_no_info	22.9 µs	27.6 µs	-17.14%
🔥	test_validate_literal[python-few_mixed]	25.3 µs	22.5 µs	+12.3%
❌	test_tagged_union_int_keys_python	30.3 µs	56.3 µs	-46.09%
❌	test_core_model_py	47.9 µs	61.2 µs	-21.74%
🔥	test_core_model_py_extra	67.9 µs	56.8 µs	+19.7%

[samuelcolvin]

thanks so much.