chore: do not warn when failing to generate changelog

Author: hasundue

src/report.ts

@@ -42,7 +42,7 @@ export async function createReport(
           content += "\n\n" + changelog;
         }
       } catch {
-        actions.warning(`Failed to generate changelog for ${to.name}`);
+        actions.info(`Failed to generate changelog for ${to.name}`);
       }
       return content;
     }),