doc: adds vals-operator to secrets list (#11795) #10

Job	Run time
Build & cache Go code	4m 15s
Check changes to generated code	11m 36s
Ensure Go modules synchronicity	21s
Build, test & lint UI code	2m 22s
Lint Go code	1m 13s
Run unit tests with -race for Go packages	14m 20s
Run end-to-end tests (v1.27.2)	51m 0s
Run unit tests for Go packages	6m 32s
Run end-to-end tests (v1.26.0)	49m 25s
Run end-to-end tests (v1.25.4)	53m 36s
Run end-to-end tests (v1.24.3)	57m 31s
Process & analyze test artifacts	25s
	4h 12m 36s

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