[chore][pkg/ottl] Minor OTTL documentation copy editing (#36806) #18093

Job	Run time
arm-unittest-matrix (receiver-0)	7m 41s
arm-unittest-matrix (receiver-1)	9m 27s
arm-unittest-matrix (receiver-2)	10m 48s
arm-unittest-matrix (receiver-3)	10m 21s
arm-unittest-matrix (processor-0)	6m 26s
arm-unittest-matrix (processor-1)	7m 39s
arm-unittest-matrix (exporter-0)	5m 38s
arm-unittest-matrix (exporter-1)	12m 51s
arm-unittest-matrix (exporter-2)	6m 26s
arm-unittest-matrix (exporter-3)	7m 13s
arm-unittest-matrix (extension)	7m 45s
arm-unittest-matrix (connector)	6m 17s
arm-unittest-matrix (internal)	8m 56s
arm-unittest-matrix (pkg)	5m 47s
arm-unittest-matrix (cmd-0)	3m 43s
arm-unittest-matrix (cmd-1)	3m 59s
arm-unittest-matrix (other)	6m 32s
arm-unittest	1s
	2h 7m 30s

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