Docs: Fix broken cross-reference.
Docs: Fix broken cross-reference.

stewnorriss/helios,udomsak/helios,spotify/helios,molindo/helios,dflemstr/helios,dflemstr/helios,stewnorriss/helios,kidaa/helios,mattnworb/helios,udomsak/helios,kidaa/helios,mavenraven/helios,spotify/helios,mattnworb/helios,spotify/helios,udomsak/helios,molindo/helios,dflemstr/helios,mavenraven/helios,gtonic/helios,stewnorriss/helios,mattnworb/helios,mavenraven/helios,molindo/helios,kidaa/helios,gtonic/helios,gtonic/helios