Update README.md (#467)

Co-authored-by: hanabi1224 <[email protected]>

Author: danmoseley

README.md

@@ -57,7 +57,7 @@ _Current benchmarks problems and their implementations are from [The Computer La
 
 ## Prerequisites
 
-[net7](https://dotnet.microsoft.com/)
+[net9](https://dotnet.microsoft.com/)
 
 [nodejs 14](https://nodejs.org/)