Fix peer server update failure (#9824)
Fix peer server update failure (#9824)

When updating all servers following the constructions of mc update,
only the endpoint server will be updated successfully.
All the other peer servers' updating failed due to the error below:
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parsing time "2006-01-02T15:04:05Z07:00" as "<release version>": cannot parse "-01-02T15:04:05Z07:00" as "0-" 
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aead/minio,minio/minio,aead/minio,minio/minio,vadmeste/minio,aead/minio,donatello/minio,NitishT/minio,krisis/minio,vadmeste/minio,aead/minio,balamurugana/minio,krisis/minio,balamurugana/minio,aead/minio,donatello/minio,NitishT/minio,aead/minio,NitishT/minio,aead/minio,aead/minio,NitishT/minio