core: improve docstring to keep Mavsdk alive #4225

Job	Run time
Ubuntu/Debian packaging (Ubuntu 20.04)	7m 36s
coverage (ubuntu-20.04)	6m 8s
alpine 3.19.0 (musl)	11m 9s
ubuntu-20.04 (package, non-mavsdk_server)	7m 46s
android-arm	6m 49s
ubuntu-22.04 (package, non-mavsdk_server)	6m 5s
linux-armv6	5m 43s
android-arm64	6m 41s
linux-armv6-musl	13m 1s
ubuntu-24.04 (package, non-mavsdk_server)	7m 5s
linux-armv7	5m 41s
linux-armv7l-musl	12m 40s
android-x86	6m 29s
linux-arm64	5m 51s
linux-arm64-musl	13m 33s
android-x86_64	6m 32s
linux-arm64-lts	5m 14s
ios	1h 2m 20s
ios_simulator_x64	6m 2s
ubuntu-20.04 (mavsdk, hunter)	4m 35s
ios_simulator_arm64	1h 22m 17s
macOS x64	16m 12s
ubuntu-20.04 (non-mavsdk_server, non-superbuild)	6m 21s
macOS arm64	6m 18s
macOS framework x64	14m 20s
ubuntu-24.04 (style and proto check)	1m 35s
ubuntu-20.04 (mavsdk_server, superbuild)	13m 42s
macOS framework arm64	6m 53s
Windows	13m 55s
ubuntu-22.04 (mavsdk_server, superbuild)	11m 0s
ubuntu-24.04 (mavsdk_server, superbuild)	12m 56s
ubuntu-24.04 (mavsdk_server, superbuild)	12m 39s
ubuntu-24.04 (mavsdk_server, superbuild)	12m 44s
iOS XCFramework	1m 9s
	6h 59m 1s

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