Update README.md

README.md

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 # `gsUnstructuredSplines`: Unstructured spline constructions for G+Smo
 
-
 |CMake flags|```-DGISMO_OPTIONAL="<other submodules>;gsUnstructuredSplines"```|
 |--:|---|
 |License|[MPL 2.0](https://www.mozilla.org/en-US/MPL/2.0/)|
 |OS support|Linux, Windows, macOS|
 |Repository|[gismo/gismo/gsUnstructuredSplines](https://github.com/gismo/gsUnstructuredSplines)|
-|Status|completed|
+|Status|[![ci](https://github.com/gismo/gsUnstructuredSplines/actions/workflows/ci.yml/badge.svg)](https://github.com/gismo/gsUnstructuredSplines/actions/workflows/ci.yml)|
 |Dependencies|[gismo/gismo](https://github.com/gismo/gismo)|
 |Developer|[Pascal Weinmueller](https://github.com/weinmueller),[Hugo Verhelst](https://github.com/hverhelst),[Andrea Farahat](https://github.com/AndreaFarahat)|
 |Maintainers|[[email protected]](mailto:[email protected]),[[email protected]](mailto:[email protected])|