chore: adjust codecov patch judge standard (#2892)

* fix: codecov patch strategy

* Update codecov.yml

---------

Co-authored-by: oasis <[email protected]>

Author: Miles-hxy

codecov.yml

@@ -0,0 +1,11 @@
+# codecov.yml
+coverage:
+  status:
+    project:
+      default:
+        threshold: 0.5%
+        target: 85%
+    patch:
+      default:
+        target: 90%
+