build(node): Bump Node to 22 (#20256)

`screenshot-pipeline.yml` and `update-docs-changelog.yml` set up Node
20, which has no fix for CVE-2026-111497 (Brotli) or the eMudhra root
update. This moves both to Node 22, which resolves to 22.23.4 and
matches the repo's `volta` pin. Tracked in VULN-3216.

This is a major-line move (20 → 22).

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via **Geoff Goldsmith**.
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Co-authored-by: sentry-junior[bot] <264270552+sentry-junior[bot]@users.noreply.github.com>
Co-authored-by: Geoff Goldsmith <geoff.goldsmith@sentry.io>

Author: sentry-junior[bot]

.github/workflows/screenshot-pipeline.yml

@@ -43,7 +43,7 @@ jobs:
       - name: Setup Node.js
         uses: actions/setup-node@v4
         with:
-          node-version: 20
+          node-version: 22
 
       - name: Install pipeline dependencies
         run: npm install

.github/workflows/update-docs-changelog.yml

@@ -27,7 +27,7 @@ jobs:
       - name: Setup Node.js
         uses: actions/setup-node@v4
         with:
-          node-version: '20'
+          node-version: '22'
 
       - name: Update docs changelog
         env: