[master] Update runtime API documentation #8980

Job	Run time
Build Ballerina Lang	7m 5s
Build Ballerina Distribution	2h 0m 15s
Build Stdlib Level (1)	3m 43s
Build Stdlib Level (10)	5m 42s
Build Stdlib Level (2)	14m 4s
Build Stdlib Level (3)	13m 12s
Build Stdlib Level (4)	21m 58s
Build Stdlib Level (5)	8m 17s
Build Stdlib Level (6)	45m 33s
Build Stdlib Level (7)	42m 33s
Build Stdlib Level (8)	51m 58s
Build Stdlib Level (9)	2h 0m 15s
	7h 34m 35s

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