Update spec.lua comment

Author: LPGhatguy

spec.lua

@@ -11,7 +11,7 @@ local LOAD_MODULES = {
 -- This makes sure we can load Lemur and other libraries that depend on init.lua
 package.path = package.path .. ";?/init.lua"
 
--- If this fails, make sure you've run `lua bin/install-dependencies.lua` first!
+-- If this fails, make sure you've cloned all Git submodules of this repo!
 local lemur = require("modules.lemur")
 
 -- Create a virtual Roblox tree