print tag filter message to stderr

src/main.rs

@@ -53,7 +53,7 @@ fn run(
     uploader: &dyn AssetUploader,
 ) -> Result<(), Box<dyn Error>> {
     if !is_tag(&conf.github_ref) {
-        log::error!("GH Releases require a tag");
+        eprintln!("GH Releases require a tag");
         return Ok(());
     }