chore(coderabbit): Disable auto-generated high level summary in PR descriptions (#1000)

Co-authored-by: Akhilesh Negi <akhileshnegi.an3@gmail.com>
Co-authored-by: Ayush <80516839+Ayush8923@users.noreply.github.com>

Author: 3 people

.coderabbit.yaml

@@ -1,4 +1,5 @@
 reviews:
+  high_level_summary: false
   auto_review:
     enabled: true
     labels: