[doc-only] Minor documentation fix and clarification for the data API #6030

Job	Run time
Bitrot check	1m 31s
Latest build on ubuntu-latest	2m 6s
Check ZFuture build on Linux	24s
Latest build on windows-latest	3m 34s
Build target wasm32-wasi	56s
Check ZFuture build on macOS	33s
Latest build on macOS-latest	1m 43s
Clippy (MSRV)	1m 16s
Check ZFuture build on Windows	2m 50s
Clippy (beta)	14s
Intra-doc links	2m 7s
Code coverage	1h 0m 59s
Rustfmt	16s
protobuf consistency	1m 6s
Test on Linux	6m 7s
UUID validity	3s
Test Orchard on Linux	7m 48s
Test NU7 on Linux	6m 9s
Test on macOS	9m 58s
Test Orchard on macOS	11m 1s
Test on Windows	12m 23s
Test Orchard on Windows	15m 12s
Test NU7 on Windows	13m 5s
Required status checks have passed	1s
	2h 41m 22s

Provide feedback