chore(deps): update hmac requirement from 0.12 to 0.13 (#988)

* chore(deps): update hmac requirement from 0.12 to 0.13

Updates the requirements on [hmac](https://github.com/RustCrypto/MACs) to permit the latest version.
- [Commits](https://github.com/RustCrypto/MACs/compare/hmac-v0.12.0...hmac-v0.13.0)

---
updated-dependencies:
- dependency-name: hmac
  dependency-version: 0.13.0
  dependency-type: direct:production
...

Signed-off-by: dependabot[bot] <support@github.com>

* fix: align hmac and sha2 digest versions

---------

Signed-off-by: dependabot[bot] <support@github.com>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>
Co-authored-by: Dale Seo <5466341+DaleSeo@users.noreply.github.com>

crates/rmcp/src/model/request_state.rs

@@ -63,7 +63,7 @@
 use std::time::Duration;
 
 use base64::{Engine, engine::general_purpose::URL_SAFE_NO_PAD};
-use hmac::{Hmac, Mac};
+use hmac::{Hmac, KeyInit, Mac};
 use serde::{Serialize, de::DeserializeOwned};
 use sha2::Sha256;
 use thiserror::Error;