doc comment fix #3515

Job	Run time
Setup Build Matrix (true, ion-rust, windows, macos, ubuntu, al2-x86, al2-arm, windows, macos, ubu...	1s
Build and Test (windows, default)	5m 11s
Build and Test (windows, all)	6m 32s
Build and Test (windows, experimental-ion-hash)	5m 50s
Build and Test (windows, experimental)	6m 45s
Build and Test (macos, default)	1m 47s
Build and Test (macos, all)	2m 29s
Build and Test (macos, experimental-ion-hash)	2m 1s
Build and Test (macos, experimental)	2m 30s
Build and Test (ubuntu, default)	2m 4s
Build and Test (ubuntu, all)	4m 27s
Build and Test (ubuntu, experimental-ion-hash)	2m 31s
Build and Test (ubuntu, experimental)	2m 58s
Build and Test (al2-x86, default)	1m 36s
Build and Test (al2-x86, all)	2m 19s
Build and Test (al2-x86, experimental-ion-hash)	1m 51s
Build and Test (al2-x86, experimental)	2m 11s
Build and Test (al2-arm, default)	1m 39s
Build and Test (al2-arm, all)	2m 6s
Build and Test (al2-arm, experimental-ion-hash)	1m 46s
Build and Test (al2-arm, experimental)	2m 2s
Build and Test Confirmation	1s
	1h 0m 37s

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