[3.11] gh-102304: doc: Add links to Stable ABI and Limited C API (#105345) (#105371) #88897

Job	Run time
Check for source changes	15s
Windows (x86)	0s
Check if the ABI has changed	0s
Check if generated files are up to date	0s
Ubuntu	0s
macOS	0s
Windows (x64)	0s
Windows (arm64)	0s
Address sanitizer	0s
Ubuntu SSL tests with OpenSSL	0s
Docs / Docs	2m 44s
Docs / Doctest	7m 30s
Docs / Docs (Oldest Sphinx)	2m 7s
All required checks pass	4s
	12m 40s

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