log: silence gif log

Signed-off-by: William Casarin <jb55@jb55.com>

crates/notedeck_ui/src/images.rs

@@ -261,7 +261,7 @@ fn generate_gif(
             );
 
             if tex_input.send(texture_frame).is_err() {
-                tracing::error!("AnimationTextureFrame mpsc stopped abruptly");
+                tracing::debug!("AnimationTextureFrame mpsc stopped abruptly");
                 break;
             }
         }