Bump @angular/platform-server from 19.1.4 to 19.2.6

Bumps [@angular/platform-server](https://github.com/angular/angular/tree/HEAD/packages/platform-server) from 19.1.4 to 19.2.6.
- [Release notes](https://github.com/angular/angular/releases)
- [Changelog](https://github.com/angular/angular/blob/main/CHANGELOG.md)
- [Commits](https://github.com/angular/angular/commits/19.2.6/packages/platform-server)

---
updated-dependencies:
- dependency-name: "@angular/platform-server"
  dependency-version: 19.2.6
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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

Author: dependabot[bot]

package-lock.json

@@ -54,7 +54,7 @@
     "@angular/forms": "19.1.4",
     "@angular/platform-browser": "19.1.4",
     "@angular/platform-browser-dynamic": "19.1.4",
-    "@angular/platform-server": "19.1.4",
+    "@angular/platform-server": "19.2.6",
     "@angular/router": "19.1.4",
     "@angular/ssr": "19.2.7",
     "angular-plotly.js": "^5.2.2",