config(nvim): disable rocks in lazy.nvim

See https://github.com/folke/lazy.nvim/blob/v11.13.1/doc/lazy.nvim.txt#L76

data/nvim/init.lua

@@ -676,4 +676,7 @@ require("lazy").setup({
 			},
 		},
 	},
+	rocks = {
+		enabled = false,
+	},
 })