Update CONTRIBUTING.md

Co-authored-by: Jason Malinowski <[email protected]>

Author: dibarbet

CONTRIBUTING.md

@@ -23,7 +23,7 @@ To **test** do the following: `npm run test` or <kbd>F5</kbd> in VS Code with th
 
 ### Using a locally developed Roslyn server
 
-https://github.com/dotnet/roslyn contains the server implementation.  Follow the instructions there to build the repo as normal.  Once built, the server executable will be located in the build output directory, typically
+https://github.com/dotnet/roslyn contains the server implementation.  Follow the instructions there to build the repo as normal.  Once built, the server DLL will be located in the build output directory, typically
 
 `$roslynRepoRoot/artifacts/bin/Microsoft.CodeAnalysis.LanguageServer/Debug/net7.0/Microsoft.CodeAnalysis.LanguageServer.dll`