Fix error message formatting

bot/src/commands/aggregators/com3d2_updates.ts

@@ -68,7 +68,7 @@ async function aggregate() {
             needsTranslation: true
         }] as INewsItem[];
     } catch(err) {
-        logger.error("Failed to parse com3d2 update site", err);
+        logger.error("Failed to parse com3d2 update site: %s", err);
         return [];
     }
 }

bot/src/commands/aggregators/com3d2_world.ts

@@ -75,7 +75,7 @@ async function aggregate() {
         }
         return result;
     } catch(err) {
-        logger.error("Failed to process com3d2.world news", err);
+        logger.error("Failed to process com3d2.world news: %s", err);
         return [];
     }
 }

bot/src/commands/aggregators/kiss_diary.ts

@@ -78,7 +78,7 @@ async function aggregate() {
 
         return result;
     } catch(err) {
-        logger.error("Failed to parse KISS Diary news", err);
+        logger.error("Failed to parse KISS Diary news: %s", err);
         return [];
     }
 }

bot/src/commands/forums_news_checker.ts

@@ -106,7 +106,7 @@ export class ForumsNewsChecker {
                     await this.addVerifyMessage(itemObj);
             }
         } catch (err) {
-            logger.error("Failed to check forums", err);
+            logger.error("Failed to check forums: %s", err);
         }
     }