Fix badges in README

Author: andreasnoack

README.md

@@ -1,7 +1,7 @@
 # StructArrays
 
-[![CI](https://github.com/JuliaArrays/StructArrays.jl/workflows/CI/badge.svg?branch=master)](https://github.com/JuliaArrays/StructArrays.jl/actions?query=workflow%3ACI+branch%3Amaster)
-[![codecov.io](http://codecov.io/github/JuliaArrays/StructArrays.jl/coverage.svg?branch=master)](http://codecov.io/github/JuliaArrays/StructArrays.jl?branch=master)
+[![CI](https://github.com/JuliaArrays/StructArrays.jl/actions/workflows/CI.yml/badge.svg)](https://github.com/JuliaArrays/StructArrays.jl/actions/workflows/CI.yml)
+[![codecov](https://codecov.io/github/JuliaArrays/StructArrays.jl/graph/badge.svg?token=ZzgMbya9U7)](https://codecov.io/github/JuliaArrays/StructArrays.jl)
 [![](https://img.shields.io/badge/docs-stable-blue.svg)](https://JuliaArrays.github.io/StructArrays.jl/stable)
 
 This package defines an array type, `StructArray`, which acts like an array of `struct` elements but which internally is stored as a list of arrays, typically one per field of the `struct`. See the [documentation](https://JuliaArrays.github.io/StructArrays.jl/stable) for details.