Update README.md

README.md

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 # GeoStatsFunctions.jl
 
-[![Build Status](https://github.com/JuliaEarth/GeoStatsFunctions.jl/actions/workflows/CI.yml/badge.svg?branch=main)](https://github.com/JuliaEarth/GeoStatsFunctions.jl/actions/workflows/CI.yml?query=branch%3Amain)
-[![Coverage](https://codecov.io/gh/JuliaEarth/GeoStatsFunctions.jl/branch/main/graph/badge.svg)](https://codecov.io/gh/JuliaEarth/GeoStatsFunctions.jl)
+[![][build-img]][build-url] [![][codecov-img]][codecov-url]
 
 Geostatistical functions for the [GeoStats.jl](https://github.com/JuliaEarth/GeoStats.jl) framework.
 
 ## Asking for help
 
 If you have any questions, please [contact our community](https://juliaearth.github.io/GeoStats.jl/stable/about/community.html).
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+[build-img]: https://img.shields.io/github/actions/workflow/status/JuliaEarth/GeoStatsFunctions.jl/CI.yml?branch=master&style=flat-square
+[build-url]: https://github.com/JuliaEarth/GeoStatsFunctions.jl/actions
+
+[codecov-img]: https://codecov.io/gh/JuliaEarth/GeoStatsFunctions.jl/branch/master/graph/badge.svg
+[codecov-url]: https://codecov.io/gh/JuliaEarth/GeoStatsFunctions.jl