better markdown format

src/config.ts

@@ -33,7 +33,7 @@ export class InstanceConfig {
 
   formatAlert(dto: AlertDto) {
     const { alerts } = dto;
-    let text = `${this.markdown ? segment('markdown') : ''}# ${this.title}`;
+    let text = `# ${this.title}`;
 
     for (const alert of alerts) {
       const resolved = alert.status === 'resolved';
@@ -51,6 +51,9 @@ export class InstanceConfig {
       }
       text += `${alert.annotations.description}`;
     }
+    if (this.markdown) {
+      text = segment('markdown', text).toString();
+    }
     return text;
   }