Public bug reported:

[Impact]
new upstream release; usual vendored dependency updates per Go MIR policy 
(vendor/ directory is automatically generated by go mod vendor based on go.mod).

Targeted releases: noble, jammy

[Test plan]
* Test suite passes

* Deploy Azure CVM and TPM FDE
* Upgrade to this new package and reboot
* Boot should be successful
* Double check bios_measurements_log to ensure that the newly update shim was 
used for boot 
(https://github.com/canonical/tcglog-parser/tree/master/tcglog-dump can be used 
to extract checksum of the shim binary used at boot and compared to the one 
shipped in nullboot)

* CPC - build new image with nullboot preinstalled, and attempt to
register and boot such an images as first time.

We have set block-proposed to allow testing in {noble,jammy}-proposed to
be carried out before migration to  release pockets.

[Where problems could occur]
Resealing of Azure CVM machines could fail and they would need to be unlocked 
with a recovery key.

NOTE: this bug follows precedent set by
https://bugs.launchpad.net/ubuntu/+source/nullboot/+bug/2061754

** Affects: nullboot (Ubuntu)
     Importance: Undecided
         Status: Invalid

** Affects: nullboot (Ubuntu Jammy)
     Importance: Undecided
         Status: New

** Affects: nullboot (Ubuntu Noble)
     Importance: Undecided
         Status: New


** Tags: block-proposed

** Tags added: block-proposed

** Also affects: nullboot (Ubuntu Noble)
   Importance: Undecided
       Status: New

** Also affects: nullboot (Ubuntu Jammy)
   Importance: Undecided
       Status: New

** Changed in: nullboot (Ubuntu)
       Status: New => Invalid

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https://bugs.launchpad.net/bugs/2110302

Title:
  nullboot 0.5.3 SRUs

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