Make logs less noisy

Don't emit log messages about issues with no changes.

techtree-manager/src/main.rs

@@ -146,7 +146,7 @@ async fn run() -> anyhow::Result<()> {
             .with_context(|| format!("Failed to find or make bot comment in issue #{issue}"))?;
 
         if bot_comment.body.contains(&hash) {
-            log::info!("Issue #{issue} is up-to-date, not editing comment.");
+            log::debug!("Issue #{issue} is up to date, not editing comment.");
             issue::remove_stale_label(&ctx, issue)
                 .await
                 .with_context(|| format!("Failed to remove `Stale` label from issue #{issue}"))?;