rust/toolchains(deps): bump wasm-encoder in /tools-builder/toolchains (#480)

Bumps [wasm-encoder](https://github.com/bytecodealliance/wasm-tools) from 0.246.2 to 0.250.0.
- [Release notes](https://github.com/bytecodealliance/wasm-tools/releases)
- [Commits](https://github.com/bytecodealliance/wasm-tools/commits)

---
updated-dependencies:
- dependency-name: wasm-encoder
  dependency-version: 0.250.0
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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Author: dependabot[bot]

tools-builder/toolchains/Cargo.lock

@@ -17,7 +17,7 @@ log = "0.4"
 
 # WebAssembly parsing and manipulation
 wasmparser = "0.243"
-wasm-encoder = "0.246"
+wasm-encoder = "0.250"
 wat = "1.250"
 
 # Component model support