ci(build-dist): bump Node 20 → 22 to match other workflows

`packages/vscode` runs `tsx scripts/schema.ts` in its `prepare` hook,
which transitively calls `ts-json-schema-generator` → `fs.globSync` —
a Node 22+ API. The other workflows (autofix / test / smoke / release)
already use `lts/*` (≥22); only this one was pinned to 20 via the
`runsascoded/npm-dist@v1` default.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

Author: ryan-williams

.github/workflows/build-dist.yml

@@ -20,6 +20,9 @@ jobs:
       - uses: runsascoded/npm-dist@v1
         with:
           source_ref: ${{ inputs.source_ref || 'main' }}
+          # Match the other workflows (autofix/test/smoke/release) which use Node 22 LTS.
+          # Slidev's `packages/vscode` prepare hook calls `fs.globSync` (Node 22+ only).
+          node_version: '22'
           build_command: pnpm run build
           pkgs: |
             packages/client