Updated multi-value message

[jzabinski-dolios]

Resolves #1796

To test locally:

1. Make a WAT file containing a function which returns multiple values. Example:

(module
    (func $mult (export "mult")
        (result f64 f64)
        f64.const 1
        f64.const 2
    )
)

2. Use wat2wasm to compile, disabling multi-value. For example:

sudo bin/wat2wasm --disable-multi-value examples/multi.wat -o examples/multi.wasm

An error should be returned by the compiler. The wording of the error should be multiple result values are not supported without multi-value enabled.

[sbc100]

Looks like there is lint failure.. can you git clang-format origin/main?