fix coverage

Author: bigcat88

.github/.codecov.yml

@@ -1,3 +1,6 @@
+codecov:
+  allow_coverage_offsets: true  # Avoid "Missing base report" due to committing with "[CI skip]"
+
 comment:
   require_changes: true
   layout: "diff, files"
@@ -7,5 +10,5 @@ coverage:
     project:
       default:
         target: auto
-        threshold: 1%
+        threshold: 0.5%
     patch: off