fix: upgrade vulnerable dependencies for v6.6.0

[kihonq]

PR Checklist

Please check if your PR fulfills the following requirements:

• The commit message follows our guidelines
• Tests for the changes have been added (for bug fixes / features)
• Docs have been added / updated (for bug fixes / features)

PR Type

What kind of change does this PR introduce?

• Bugfix
• Feature
• Code style update (formatting, local variables)
• Refactoring (no functional changes, no api changes)
• Adding Tests
• Build related changes
• CI related changes
• Documentation changes
• Other... Please describe:

What is the current behavior?

The current v6.6.0 release has two security vulnerabilities:

1. Critical: [email protected] - SNYK-JS-FORMDATA-10841150 (Predictable Value Range)
2. High: [email protected] - SNYK-JS-NJWT-6861582 (Prototype Pollution)

Issue Number: N/A

What is the new behavior?

This PR upgrades the vulnerable dependencies to their secure versions:

• form-data: 4.0.0 → 4.0.4 (patch upgrade, no breaking changes)
• njwt: 1.0.0 → 2.0.1 (major upgrade, but API compatible)

All tests pass successfully after the upgrades.

Does this PR introduce a breaking change?

• Yes
• No

Other information

• Security Impact: Resolves 2 critical security vulnerabilities
• Testing: All unit tests and Jest tests pass successfully
• Compatibility: Backward compatible with existing code
• Dependencies: Only affects dev dependencies, no runtime API changes

Reviewers

@okta/okta-sdk-nodejs-maintainers