[RENOVATE] bitnami/minio upgrades are rare

It is used in the CI to verify the S3 backend works. It has no
security or feature requirements and upgrading would only be required
when a major version is published, which cannot be deduced from the
version number.

Making that upgrade available from the dashboard and dealt with when
and if it gets the attention of a developer, even if once a year, is
good enough.

renovate.json

@@ -26,7 +26,7 @@
     },
     {
       "description": "Require dashboard approval for some deps",
-      "matchDepNames": ["github.com/go-ap/activitypub"],
+      "matchDepNames": ["github.com/go-ap/activitypub", "bitnami/minio"],
       "dependencyDashboardApproval": true
     },
     {