https://github.com/cloudfoundry/stratos/security/dependabotUpdate Dependabot to reduce spam

[krutten]

Description

Update Dependabot setting while updating project

Motivation and Context

Currently Dependabot is spamming the issues and PR's with requests for parts of the project that are deprecated or unused

How Has This Been Tested?

Types of changes

• Bug fix (non-breaking change which fixes an issue)
• Docs update
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)
• Code management process change

Checklist:

• My code follows the code style of this project.
• My change requires a change to the documentation.
• I have updated the documentation accordingly.
• I have followed the guidelines in CONTRIBUTING.md, including the required formatting of the commit message

[wayneeseguin]

Yay!