Improve HACKING.md to clarify that work-on should be used *instead of* try-reflex
Improve HACKING.md to clarify that work-on should be used *instead of* try-reflex

ocharles/try-reflex,paldepind/try-reflex,reflex-frp/reflex-platform,reflex-frp/reflex-platform,reflex-frp/reflex-platform,ryantrinkle/try-reflex,ajnsit/reflex-platform