Reduce patch coverage target in codecov.yaml

This has been 100% but it's too high in practice (even with a threshold), we should be able to ignore a few lines or so.

Author: nathanjmcdougall

codecov.yaml

@@ -8,5 +8,5 @@ coverage:
     patch:
       default:
         enabled: yes
-        target: 100
-        threshold: 1
+        target: 95
+        threshold: 1