README: fix branch name in AppVeyor status
@@ -9,7 +9,7 @@ Haskell and Lua.
[GitHub Actions badge]: https://img.shields.io/github/workflow/status/hslua/hslua/CI.svg?logo=github
[GitHub Actions]: https://github.com/hslua/hslua/actions
-[AppVeyor Status]: https://ci.appveyor.com/api/projects/status/ldutrilgxhpcau94/branch/master?svg=true
+[AppVeyor Status]: https://ci.appveyor.com/api/projects/status/ldutrilgxhpcau94/branch/main?svg=true
[Hackage]: https://img.shields.io/hackage/v/hslua.svg
