README.md in shaped-0.11.0 vs README.md in shaped-0.12.0

- old
+ new

@@ -1,5 +1,5 @@
-[![codecov](https://codecov.io/gh/davidrunger/shaped/branch/master/graph/badge.svg)](https://codecov.io/gh/davidrunger/shaped)
+[![codecov](https://codecov.io/gh/davidrunger/shaped/branch/main/graph/badge.svg)](https://codecov.io/gh/davidrunger/shaped)
 [![Gem Version](https://badge.fury.io/rb/shaped.svg)](https://badge.fury.io/rb/shaped)
 
 # Shaped
 
 Validate the "shape" of Ruby objects!