fix test status badge

Author: ValentinHirschi

Readme.md

@@ -6,7 +6,7 @@ This fork of the symbolica code is not meant to be used outside of the context o
 
 Make sure to instead use the original codebase available [here]("https://github.com/benruijl/symbolica").
 <p align="center">
-<a href="https://github.com/alphal00p/gammaloop"><img alt="Compatibility tests with gammaLoop" src="https://github.com/alphal00p/gammaloop/actions/workflows/gamma_loop_tests.yml/badge.svg?event=push"></a>
+<a href="https://github.com/alphal00p/gammaloop"><img alt="Compatibility tests with gammaLoop" src="https://github.com/alphal00p/symbolica/actions/workflows/symbolica_tests.yml/badge.svg?event=push"></a>
 </p>
 
 ##
@@ -142,4 +142,4 @@ which yields `(45+13*x+50*x*y^2+152*x^2+25*x^2*y^4+300*x^3*y^2+150*x^4*y^4)/(5+2
 
 ## Development
 
-Follow the development and discussions on [Zulip](https://reform.zulipchat.com)!
+Follow the development and discussions on [Zulip](https://reform.zulipchat.com)!