docs: switch from cdn.gitcdn.link to gitcdn.xyz. update dependencies

[Splaktar]

PR Checklist

Please check that your PR fulfills the following requirements:

• The commit message follows our guidelines
• Tests for the changes have been added or this is not a bug fix / enhancement
• Docs have been added, updated, or were not required

PR Type

What kind of change does this PR introduce?

[ ] Bugfix
[ ] Enhancement
[x] Documentation content changes
[ ] Code style update (formatting, local variables)
[ ] Refactoring (no functional changes, no api changes)
[ ] Build related changes
[ ] CI related changes
[x] Infrastructure changes
[ ] Other... Please describe:

What is the current behavior?

CodePen demos from the 1.1.17 release don't load. HEAD works, but not the /latest docs.

Issue Number:
Fixes #11696

What is the new behavior?

• switch from cdn.gitcdn.link to gitcdn.xyz
• fix 5 vulnerability alerts
  • update angularjs, moment, karma, karma-browserstack-launcher
• fix minor autocomplete docs typo

Does this PR introduce a breaking change?

[ ] Yes
[x] No

Other information

We'll need to do another release to get the docs working again once this is merged in.

[jelbourn]

LGTM