[3.12] Improve `pathname2url()` and `url2pathname()` docs (GH-127125)… #133649

Job	Run time
Change detection / Compute changed files	9s
Check if the ABI has changed	1m 28s
Check if Autoconf files are up to date	30s
Check if generated files are up to date	3m 13s
Docs	0s
Address sanitizer	11m 22s
Ubuntu SSL tests with OpenSSL (ubuntu-22.04, 3.0.15)	4m 5s
Windows MSI${{ '' }}	0s
Ubuntu SSL tests with OpenSSL (ubuntu-22.04, 3.1.7)	4m 26s
Ubuntu SSL tests with OpenSSL (ubuntu-22.04, 3.2.3)	4m 21s
Hypothesis tests on Ubuntu	5m 22s
Ubuntu SSL tests with OpenSSL (ubuntu-22.04, 3.3.2)	4m 50s
Thread sanitizer / Thread sanitizer	5m 25s
macOS / build and test (ghcr.io/cirruslabs/macos-runner:sonoma)	5m 39s
macOS / build and test (macos-13)	13m 23s
Ubuntu / build and test (ubuntu-22.04)	10m 38s
Windows / build (arm64)	1m 54s
Windows / build and test (Win32)	15m 6s
Windows / build and test (x64)	15m 37s
All required checks pass	4s
	1h 47m 32s

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