PROJQUAY-7424: Correct the quay_storage volume name in uninstalling task

[bysnupy]

• Description: The "quay_storage" volume name in the uninstall task should be "quay-storage" for deleting the volume directory during uninstalling. Because the quay volume creates as "quay-storage" by default when installing. The volume name should be matched. Refer the following codes which show us the place holder of "quay_storage=%s" is "quay-storage" by default as well.
• References:
  • https://github.com/quay/mirror-registry/blob/26d82cea952998d643d53cc2c8248af6ea2e12b4/cmd/install.go#L102