Typo in warning: "Unkown message type"

[SimonCockx]

See https://github.com/eclipse-lsp4j/lsp4j/blob/5486d6fc35c87b22afd0a241154ca27f204dd9da/org.eclipse.lsp4j.jsonrpc/src/main/java/org/eclipse/lsp4j/jsonrpc/RemoteEndpoint.java#L200C27-L200C30

LOG.log(Level.WARNING, "Unkown message type.", message);