[angular] upgrade bootstrap in sample app

[art-alexeyenko]

• Upgrades bootstrap to v5.2 in angular sample app
• Adds resolutions to avoid rules skip during build
• Tweaks CSS to match changes in bootstrap v5

Known issue:

• You may get the following error when building angular sample app in monorepo setup:
  ** Rules skipped due to selector errors: legend+* -> Cannot read property 'type' of undefined
  to avoid it, add resolutions for css-select into the monorepo's root package:

  "resolutions": {
    "css-select": "4.2.1"
  }

You can read more in here: GoogleChromeLabs/critters#103

Testing Details

Manual testing for build and CSS on angular sample.

Types of changes

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to change)

[ambrauer]

👍