Reduced log-level of RSS-Feed Circuit Breaker (#1431)

Author: Zabuzard

application/src/main/java/org/togetherjava/tjbot/features/rss/RSSHandlerRoutine.java

@@ -432,7 +432,7 @@ private List<Item> fetchRSSItemsFromURL(String rssUrl) {
 
             long blacklistedHours = calculateWaitHours(newCount);
 
-            logger.warn(
+            logger.debug(
                     "RSS fetch failed for {} (Attempt #{}). Backing off for {} hours. Reason: {}",
                     rssUrl, newCount, blacklistedHours, e.getMessage(), e);