add renovate coverage for minio subchart and image

General MR

Summary

• Track the kubectl image by its minor version rather than its patch version.
• Adds renovate coverage for the minio chart and minio image.

Relevant logs/screenshots

update-everything

library-subcharts-only

app-image

other-image

chart-only

chart-and-image

Linked Issue

Closes #323 (closed)

Upgrade Notices

N/A