wasm: pin Node.js to v22 instead of lts/* to avoid manifest fetch failures (#10151)

`actions/setup-node` with `node-version: "lts/*"` requires fetching a
version manifest from GitHub's servers to resolve the alias. This
manifest request was returning a GitHub 500 error, causing the `Check`
job to fail at setup.

## Changes
- **`wasm.yml`, `wasm-release.yml`**: Replace `node-version: "lts/*"`
with `node-version: "22"` (current Active LTS), eliminating the remote
manifest lookup entirely.

---------

Co-authored-by: copilot-swe-agent[bot] <198982749+Copilot@users.noreply.github.com>

Author: Copilot

.github/workflows/wasm-release.yml

@@ -26,7 +26,7 @@ jobs:
       - name: Setup node
         uses: actions/setup-node@v7
         with:
-          node-version: "lts/*"
+          node-version: "22"
           registry-url: "https://registry.npmjs.org"
 
       - name: Prepare for publish

.github/workflows/wasm.yml

@@ -26,7 +26,7 @@ jobs:
       - name: Setup node
         uses: actions/setup-node@v7
         with:
-          node-version: "lts/*"
+          node-version: "22"
 
       - name: Setup emscripten
         uses: mymindstorm/setup-emsdk@v16