Update README.md

README.md

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 | **Documentation** | **CI** | **Coverage** | **DOI** | **Downloads** |
 |:-----------------:|:------:|:------------:|:-------:|:-------------:|
-| [![docs-stable][docs-stable-img]][docs-stable-url] [![docs-dev][docs-dev-img]][docs-dev-url] | [![build-gh][build-gh-img]][build-gh-url] [![build-cirrus][build-cirrus-img]][build-cirrus-url] | [![codecov][codecov-img]][codecov-url] | [![doi][doi-img]][doi-url] | [![downloads][downloads-img]][downloads-url] |
+| [![docs-stable][docs-stable-img]][docs-stable-url] [![docs-dev][docs-dev-img]][docs-dev-url] | [![build-gh][build-gh-img]][build-gh-url] | [![codecov][codecov-img]][codecov-url] | [![doi][doi-img]][doi-url] | [![downloads][downloads-img]][downloads-url] |
 
 [docs-stable-img]: https://img.shields.io/badge/docs-stable-blue.svg
 [docs-stable-url]: https://JuliaSmoothOptimizers.github.io/Krylov.jl/stable