fix(bundler): Update missing icon error message (#626)

cli/tauri-bundler/src/main.rs

@@ -140,7 +140,7 @@ fn run() -> crate::Result<()> {
             Ok(s)
           } else {
             Err(crate::Error::from(
-              "Could not find Icon Paths. Please make sure they exist and are in your Cargo.toml's icon key.",
+              "Could not find Icon Paths. Please make sure they exist and are listed in the tauri.bundle.icon property of your tauri.conf.json.",
             ))
           }
         })