update the README file

README.md

@@ -22,7 +22,7 @@ GPU implementation of Clarabel solver for Julia
   <a href="https://oxfordcontrol.github.io/ClarabelDocs/stable">Documentation</a>
 </p>
 
-__clarabel-gpu.jl__ is the GPU implementation of the Clarabel solver, which can solve conic problems of the following form:
+__CuClarabel.jl__ is the GPU implementation of the Clarabel solver, which can solve conic problems of the following form:
 
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