npm dependency updates (theme_build, landing)

[grzegorz-roboflow]

What does this PR do?

Update dependencies reported by Github security bot

Type of Change

• Bug fix (non-breaking change that fixes an issue)

Testing

N/A

Checklist

• My code follows the style guidelines of this project
• I have performed a self-review of my own code
• I have commented my code where necessary, particularly in hard-to-understand areas
• My changes generate no new warnings or errors
• I have updated the documentation accordingly (if applicable)

Additional Context

N/A