[noble] linux-azure 6.8.0-1018.21 uploaded (ABI bump)

[kernel-team-bot at canonical.com]

A new noble kernel has been uploaded into proposed. Note the ABI bump. 
The full changelog about all bug fixes contained in this upload can be found at:

https://launchpad.net/ubuntu/noble/+source/linux-azure/6.8.0-1018.21

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