Bump wat from 1.202.0 to 1.209.1 in /native/wasmex

Bumps [wat](https://github.com/bytecodealliance/wasm-tools) from 1.202.0 to 1.209.1.
- [Release notes](https://github.com/bytecodealliance/wasm-tools/releases)
- [Commits](bytecodealliance/wasm-tools@v1.202.0...v1.209.1)

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

Signed-off-by: dependabot[bot] <[email protected]>

Author: dependabot[bot]

native/wasmex/Cargo.lock

@@ -25,4 +25,4 @@ wasmtime = "18.0.2"
 wasmtime-wasi = "18.0.2"
 wasi-common = "18.0.2"
 wiggle = "18.0.2"
-wat = "1.202.0"
+wat = "1.209.1"