Update CI status badge (#687)

README.md

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 | **Documentation** | **Source** | **Citation** |
 |:-----------------:|:----------------------:|:------------:|
 | [![](https://img.shields.io/badge/docs-stable-blue.svg)](https://juliamanifolds.github.io/Manifolds.jl/stable/) | [![Code Style: Blue](https://img.shields.io/badge/code%20style-blue-4495d1.svg)](https://github.com/invenia/BlueStyle) | [![arXiv](https://img.shields.io/badge/arXiv%20CS.MS-2106.08777-blue.svg)](https://arxiv.org/abs/2106.08777) |
-| [![](https://img.shields.io/badge/docs-dev-blue.svg)](https://juliamanifolds.github.io/Manifolds.jl/latest/) | [![CI](https://github.com/JuliaManifolds/Manifolds.jl/workflows/CI/badge.svg)](https://github.com/JuliaManifolds/Manifolds.jl/actions?query=workflow%3ACI+branch%3Amaster) | [![DOI](https://zenodo.org/badge/190447542.svg)](https://zenodo.org/badge/latestdoi/190447542) |
+| [![](https://img.shields.io/badge/docs-dev-blue.svg)](https://juliamanifolds.github.io/Manifolds.jl/latest/) | [![CI](https://github.com/JuliaManifolds/Manifolds.jl/actions/workflows/ci.yml/badge.svg)](https://github.com/JuliaManifolds/Manifolds.jl/actions?query=workflow%3ACI+branch%3Amaster) | [![DOI](https://zenodo.org/badge/190447542.svg)](https://zenodo.org/badge/latestdoi/190447542) |
 | | [![codecov.io](http://codecov.io/github/JuliaManifolds/Manifolds.jl/coverage.svg?branch=master)](https://codecov.io/gh/JuliaManifolds/Manifolds.jl/) |
 
 Package __Manifolds.jl__ aims to provide both a unified interface to define and