Fix typo in `cfg` of encoding-feature-`compile_error!`
-#[cfg(all(feature = "encoding-raw", feature = "encoding-rzcrawobs"))]
+#[cfg(all(feature = "encoding-raw", feature = "encoding-rzcobs"))]
compile_error!("Multiple `encoding-*` features are enabled. You may only enable one.");
#[cfg_attr(feature = "encoding-raw", path = "raw.rs")]
