fix: make codecov informational

Hopefully this does not fail CI.

Signed-off-by: Thibaut Vandervelden <thvdveld@vub.be>

.github/codecov.yml

@@ -1,2 +1,11 @@
 github_checks:
-  annotations: false
+  annotations: false
+
+coverage:
+  status:
+    project:
+      default:
+        informational: true
+    patch:
+      default:
+        informational: true