Update benchmarks to use Python 3.14

[bdraco]

What does this implement/fix?

Update benchmarks to use Python 3.14

Types of changes

• Bugfix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)
• Code quality improvements to existing code or addition of tests
• Other

Related issue or feature (if applicable):

• fixes

Pull request in esphome (if applicable):

• esphome/esphome#

Checklist:

• The code change is tested and works locally.
• If api.proto was modified, a linked pull request has been made to esphome with the same changes.
• Tests have been added to verify that the new code works (under tests/ folder).

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 99.84%. Comparing base (fa4dc53) to head (8422456).

Additional details and impacted files

@@             Coverage Diff             @@
##              main    #1427      +/-   ##
===========================================
- Coverage   100.00%   99.84%   -0.16%     
===========================================
  Files           22       22              
  Lines         3310     3310              
===========================================
- Hits          3310     3305       -5     
- Misses           0        5       +5     

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[codspeed-hq]

CodSpeed Performance Report

Merging #1427 will degrade performances by 7.83%

_{Comparing benchmarks_314 (8422456) with main (fa4dc53)}

Summary

❌ 3 regressions
✅ 8 untouched

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

Benchmarks breakdown

	Benchmark	BASE	HEAD	Change
❌	test_raw_ble_plain_text	23 µs	25 µs	-7.83%
❌	test_sending_empty_light_command_request	44.7 µs	47.7 µs	-6.19%
❌	test_sending_light_command_request_with_bool	48.3 µs	51.6 µs	-6.36%