test(deps): update angular example to version 16.2.12

[MikeMcC399]

• closes Angular 15 in examples is unsupported #470

Issue

The Angular project in examples/angular-app is currently configured to use Angular 15.1.3 and this version is now unsupported. See Angular - Version compatibility.

Compatibility

• .circleci/test-deploy.yml currently runs in Cypress Docker container from cypress/browsers:node-16.18.1-chrome-109.0.5414.74-1-ff-109.0-edge-109.0.1518.52-1 image. PR ci(deps): update ct docker image to cypress/browsers:node-18.20.3 #473 updates to cypress/browsers:node-18.20.3-chrome-125.0.6422.141-1-ff-126.0.1-edge-125.0.2535.85-1
• Angular 15.1.x is compatible with Node.js ^14.20.0 || ^16.13.0 || ^18.10.0
• Angular 16.1.x || 16.2.x are compatible with
  • Node.js ^16.14.0 || ^18.10.0
  • TypeScript >=4.9.3 <5.2.0

Change

In examples/angular-app apply Angular Update Guide 15.0 to 16.0 to update from Angular 15.1.3 to 16.2.12

Execute

ng update @angular/core@16 @angular/cli@16

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