Update dependency minio/operator to v4.4.21

This MR contains the following updates:

Package	Type	Update	Change
minio/operator	ironbank-github	patch	v4.4.20 -> v4.4.21
minio/operator		patch	v4.4.20 -> v4.4.21

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Release Notes

minio/operator

v4.4.21

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Changelog

• 18b8323 Release v4.4.21 (#​1144)
• f2e3fcd To update instructions to get token via helm installation (#​1148)
• 4a04420 Add support for helm to upgrade tenant crd (#​1149)
• c3ddfa0 Deploy and manage only one tenant per helm tenant release (#​1142)
• 25a965b optimize compareImage into one loop (#​1130)
• db03f01 Fix hardcoded namespace in chart (#​1141)

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