python ci: update macos version to latest (#5406) #1084

Job	Run time
Check Python types	3m 6s
Test Positron IPyKernel (ubuntu-latest, 3.8)	3m 41s
Lint	4m 31s
Test Positron IPyKernel (macos-latest, 3.9)	2m 16s
Test Positron IPyKernel (windows-latest, 3.10)	6m 57s
Test Minimum Positron IPyKernel Dependencies (ubuntu-latest, 3.8)	3m 22s
Python Tests (ubuntu-latest, 3.8)	1m 33s
Test Positron IPyKernel (ubuntu-latest, 3.11)	3m 0s
Python Tests (ubuntu-latest, 3.12)	1m 39s
Test Positron IPyKernel (ubuntu-latest, 3.12)	2m 55s
Test TypeScript (ubuntu-latest, 3.x, ts-unit)	3m 39s
Test TypeScript (ubuntu-latest, 3.x, functional)	4m 44s
Test TypeScript (macos-latest, 3.x, ts-unit)	4m 33s
Test TypeScript (macos-latest, 3.x, venv)	4m 48s
Test TypeScript (macos-latest, 3.x, single-workspace)	3m 52s
Test TypeScript (macos-latest, 3.x, debugger)	3m 31s
Test TypeScript (macos-latest, 3.x, functional)	5m 20s
Test TypeScript (macos-latest, 3.x, smoke)	4m 50s
Test TypeScript (windows-latest, 3.x, ts-unit)	11m 46s
Test TypeScript (windows-latest, 3.x, functional)	9m 12s
	1h 29m 15s

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