Bump @angular/ssr from 20.0.0 to 20.3.6 in /starters/angular/ecommerce

Bumps [@angular/ssr](https://github.com/angular/angular-cli) from 20.0.0 to 20.3.6.
- [Release notes](https://github.com/angular/angular-cli/releases)
- [Changelog](https://github.com/angular/angular-cli/blob/main/CHANGELOG.md)
- [Commits](angular/angular-cli@20.0.0...20.3.6)

---
updated-dependencies:
- dependency-name: "@angular/ssr"
  dependency-version: 20.3.6
  dependency-type: direct:production
...

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

Author: dependabot[bot]

starters/angular/ecommerce/package-lock.json

@@ -19,7 +19,7 @@
     "@angular/platform-browser-dynamic": "^20.0.0",
     "@angular/platform-server": "^20.0.0",
     "@angular/router": "^20.0.0",
-    "@angular/ssr": "^20.0.0",
+    "@angular/ssr": "^20.3.6",
     "@ngx-templates/shared": "^1.0.3",
     "express": "^4.18.2",
     "immutable": "^5.0.3",