message: fix README grammar
diff: @@ -94,8 +94,8 @@ fn main() -> error::Result<()> {
  ## Additional Notes
  -The `wasmer-runtime` crate is build to support multiple compiler
  -backends. We support have a [Cranelift] backend in the
  +The `wasmer-runtime` crate is built to support multiple compiler
  +backends. We support having a [Cranelift] backend in the
  [`wasmer-clif-backend`] crate, a [LLVM] backend in the
  [`wasmer-llvm-backend`] crate, and the [Singlepass] backend in the
  [`wasmer-singlepass-backend`] crate. Currently, the Cranelift backend
  