chore(deps): bump rkyv from 0.8.8 to 0.8.9

Bumps [rkyv](https://github.com/rkyv/rkyv) from 0.8.8 to 0.8.9.
- [Release notes](https://github.com/rkyv/rkyv/releases)
- [Commits](https://github.com/rkyv/rkyv/commits)

---
updated-dependencies:
- dependency-name: rkyv
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

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

server_fn/Cargo.toml

@@ -51,7 +51,7 @@ postcard = { version = "1", features = ["alloc"], optional = true }
 hyper = { version = "1.5", optional = true }
 bytes = "1.9"
 http-body-util = { version = "0.1.2", optional = true }
-rkyv = { version = "0.8.8", optional = true }
+rkyv = { version = "0.8.9", optional = true }
 rmp-serde = { version = "1.3.0", optional = true }
 
 # client