connector: getAnnotation: Have the type signature be stricter
connector: getAnnotation: Have the type signature be stricter

Since it actually requires that the 'data' argument be a multiAction, have
the compiler enforce that.

Signed-off-by: Luke Shumaker <1abe3165bcc8c29e8b31e5c88636540fb9350004@datawire.io>

datawire/telepresence,datawire/telepresence,datawire/telepresence