chore: Add Dependabot integration for automated dependency updates

[edreed]

What type of PR is this?

/kind cleanup

What this PR does / why we need it:

Adds Dependabot integration to provide automated dependency updates.

Which issue(s) this PR fixes:

Requirements:

• [x] uses conventional commit messages
• [ ] includes documentation
• [ ] adds unit tests
• [ ] tested upgrade from previous version

Special notes for your reviewer:

Release note:

none

[coveralls]

Pull Request Test Coverage Report for Build 1849842915

• 0 of 0 changed or added relevant lines in 0 files are covered.
• No unchanged relevant lines lost coverage.
• Overall coverage increased (+19.2%) to 66.264%

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Totals
Change from base Build 1848320161:	19.2%
Covered Lines:	5217
Relevant Lines:	7873

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💛 - Coveralls