chore: allow sphinx-autobuild to choose port for serving docs (#3959) #4709

Job	Run time
mypy	1m 3s
pyright	39s
slotscheck	20s
Test server integration (uvicorn<0.27.0)	39s
Test server integration (uvicorn>=0.27.0)	37s
Test Minimal Application with Base Dependencies	20s
validate	17s
Test Minimal Pydantic 1 application	23s
test (3.10) / test	1m 56s
test (3.11) / test	1m 53s
test (3.12) / test	3m 26s
test (3.13) / test	2m 15s
test (3.8) / test	2m 57s
test (3.9) / test	1m 53s
test-platform-compat (macos-latest) / test	1m 10s
test-platform-compat (windows-latest) / test	6m 20s
build-docs	0s
codeql	2m 12s
upload-test-coverage	14s
sonar	1m 53s
	30m 27s

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