Rename ssr.experimentalPlatform to ssr.platform in angular.json

Proprietary

Angular 22 renamed the ssr.experimentalPlatform builder option to ssr.platform on the application and build-application builders. Matches the update-workspace-config schematic.

org.openrewrite.angular.migration.rename-ssr-experimental-platform
mod run . --recipe=org.openrewrite.angular.migration.rename-ssr-experimental-platform

Install it once, then run it on every repository under the current directory. New to the Moderne CLI? Set it up.