Update the v8 crate used when fuzzing (#3929)

A recently discovered fuzz bug reported a difference in execution result
between Wasmtime and v8. The module in question had an exported function
which had multiple results, including floats. About a year ago I
reported a bug on v8 about functions with multiple results leading to
incorrect results, and it was fixed many months back but I don't think
that we ever actually pulled in that update. After updating v8 I saw the
test failure go away, so this update is being done to fix the fuzz bug
test failure I saw.

crates/fuzzing/Cargo.toml

@@ -30,7 +30,7 @@ wasmi = "0.7.0"
 # though, so we could use that if we wanted. For now though just simplify a bit
 # and don't depend on this on Windows.  The same applies on s390x.
 [target.'cfg(not(any(windows, target_arch = "s390x")))'.dependencies]
-v8 = "0.33"
+v8 = "0.41"
 
 [dev-dependencies]
 wat = "1.0.37"