Update codecov.yml (#1278)

Dont allow more than 1% overall project coverage drop per PR. 2% was too
much for such a large codebase

<!-- This is an auto-generated comment: release notes by coderabbit.ai
-->

## Summary by CodeRabbit

* **Chores**
* Updated code coverage enforcement thresholds for pull requests to
maintain stricter quality standards.

<!-- end of auto-generated comment: release notes by coderabbit.ai -->

Signed-off-by: Keval Morabia <28916987+kevalmorabia97@users.noreply.github.com>

Author: kevalmorabia97

.github/codecov.yml

@@ -9,5 +9,5 @@ coverage:
     project:
       default:
         target: auto
-        threshold: 2% # Allow atmost 2% coverage drop from main branch.
+        threshold: 1% # Allow atmost 1% coverage drop from main branch.
     patch: false