chore: Add labels to changelog workflow and renovatebot

[svetlanabrennan]

Which problem is this PR solving?

We need to skip running the changelog workflow for dependency bump prs and for any prs that don't need a changelog like updating the codeowners files for example.

Short description of the changes

• Updated changelog workflow to not run if a pr has a label of dependencies or Skip Changelog.
• Updated renovatebot to add a label of "dependencies". Note: dependabot already adds this label.

Type of change

Please delete options that are not relevant.

• New feature / enhancement (non-breaking change which adds functionality)

New Tests?

Please describe the new tests that were added (if applicable).

Not applicable for this pr.

• This change requires changes in testing:
  • unit tests
  • e2e tests

Checklist:

• Add changelog entry following the contributing guide
• Tests have been added
• Documentation has been updated