Bump spin from 0.10.0 to 0.12.0 (#500)

Bumps spin from 0.10.0 to 0.12.0.

---
updated-dependencies:
- dependency-name: spin
  dependency-version: 0.12.0
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Author: dependabot[bot]

Cargo.lock

@@ -29,7 +29,7 @@ hyperlight-guest-bin.workspace = true
 hyperlight-guest.workspace = true
 hyperlight-wasm-macro.workspace = true
 wasmtime = { version = "36.0.9", default-features = false, features = [ "runtime", "custom-virtual-memory", "custom-native-signals", "component-model" ] }
-spin = "0.10.0"
+spin = "0.12.0"
 tracing = { version = "0.1.44", default-features = false, features = ["attributes", "log"] }
 
 [build-dependencies]