fix: send error output to stderr instead of stdout

src/main.rs

@@ -259,7 +259,7 @@ fn main () {
         Err(e) => {
             eprintln!("Wasn't able to retrieve data. Logs are below:");
             eprintln!("---");
-            println!("{}", e);
+            eprintln!("{}", e);
             eprintln!("---");
             for line in retriever.trace {
                 eprintln!("{}", line);