Fix doc comment

rust-runtime/aws-smithy-runtime-api/src/client/identity.rs

@@ -27,11 +27,11 @@ new_type_future! {
 /// identity resolvers, which are selected from runtime components by the auth scheme
 /// implementation itself.
 ///
-/// The identity resolver must return a [`Future`] with the resolved identity, or an error
+/// The identity resolver must return an [`IdentityFuture`] with the resolved identity, or an error
 /// if resolution failed. There is no optionality for identity resolvers. The identity either
 /// resolves successfully, or it fails. The orchestrator will choose exactly one auth scheme
 /// to use, and thus, its chosen identity resolver is the only identity resolver that runs.
-/// There is no fallback to other auth schemes in the absense of an identity.
+/// There is no fallback to other auth schemes in the absence of an identity.
 pub trait IdentityResolver: Send + Sync + Debug {
     /// Asynchronously resolves an identity for a request using the given config.
     fn resolve_identity(&self, config_bag: &ConfigBag) -> IdentityFuture;