fix(examples): revert to node@14 compatible package-lock

[michaelbrewer]

Description of your changes

node@14 uses npm@6.* which does not support the new package lock format of node@16

How to verify this change

Run npm ci; npm run lerna-ci; npm run init-environment; npm test

Related issues, RFCs

• feat: Add codespaces/gitpod support #485
• chore(cicd): cdk examples and e2e tests for metrics  #326

PR status

Is this ready for review?: YES
Is it a breaking change?: NO

Checklist

• My changes meet the tenets criteria
• I have performed a self-review of my own code
• I have commented my code where necessary, particularly in areas that should be flagged with a TODO, or hard-to-understand areas
• I have made corresponding changes to the documentation
• My changes generate no new warnings
• The code coverage hasn't decreased
• I have added tests that prove my change is effective and works
• New and existing unit tests pass locally and in Github Actions
• Any dependent changes have been merged and published in downstream module
• The PR title follows the conventional commit semantics

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