chore: update rust toolchain version

[roypat]

Current newest is 1.89.0

Signed-off-by: Patrick Roy [email protected]## Changes

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Reason

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License Acceptance

By submitting this pull request, I confirm that my contribution is made under
the terms of the Apache 2.0 license. For more information on following Developer
Certificate of Origin and signing off your commits, please check
CONTRIBUTING.md.

PR Checklist

• I have read and understand CONTRIBUTING.md.
• I have run tools/devtool checkbuild --all to verify that the PR passes
  build checks on all supported architectures.
• I have run tools/devtool checkstyle to verify that the PR passes the
  automated style checks.
• I have described what is done in these changes, why they are needed, and
  how they are solving the problem in a clear and encompassing way.
• I have updated any relevant documentation (both in code and in the docs)
  in the PR.
• I have mentioned all user-facing changes in CHANGELOG.md.
• If a specific issue led to this PR, this PR closes the issue.
• When making API changes, I have followed the
  Runbook for Firecracker API changes.
• I have tested all new and changed functionalities in unit tests and/or
  integration tests.
• I have linked an issue to every new TODO.

---

• This functionality cannot be added in rust-vmm.

[codecov]

Codecov Report

❌ Patch coverage is 72.56637% with 31 lines in your changes missing coverage. Please review.
✅ Project coverage is 82.73%. Comparing base (55abaa8) to head (47c79e3).
⚠️ Report is 5 commits behind head on main.

Files with missing lines	Patch %	Lines
src/vmm/src/dumbo/tcp/connection.rs	26.92%	19 Missing ⚠️
src/vmm/src/arch/x86_64/mod.rs	37.50%	5 Missing ⚠️
...m/src/devices/virtio/block/virtio/event_handler.rs	25.00%	3 Missing ⚠️
src/vmm/src/devices/legacy/i8042.rs	66.66%	1 Missing ⚠️
src/vmm/src/devices/legacy/serial.rs	66.66%	1 Missing ⚠️
src/vmm/src/devices/virtio/block/device.rs	0.00%	1 Missing ⚠️
src/vmm/src/devices/virtio/block/virtio/device.rs	66.66%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #5413      +/-   ##
==========================================
- Coverage   83.13%   82.73%   -0.40%     
==========================================
  Files         266      263       -3     
  Lines       30533    27455    -3078     
==========================================
- Hits        25383    22715    -2668     
+ Misses       5150     4740     -410     

Flag	Coverage Δ
5.10-c5n.metal	?
5.10-m5n.metal	82.84% <71.02%> (-0.39%)	⬇️
5.10-m6a.metal	82.08% <71.02%> (-0.47%)	⬇️
5.10-m6g.metal	79.52% <75.00%> (-0.35%)	⬇️
5.10-m6i.metal	82.83% <71.02%> (-0.40%)	⬇️
5.10-m7a.metal-48xl	82.07% <71.02%> (?)
5.10-m7g.metal	79.52% <75.00%> (-0.35%)	⬇️
5.10-m7i.metal-24xl	82.81% <71.02%> (?)
5.10-m7i.metal-48xl	82.80% <71.02%> (?)
5.10-m8g.metal-24xl	79.52% <75.00%> (?)
5.10-m8g.metal-48xl	79.52% <75.00%> (?)
6.1-c5n.metal	?
6.1-m5n.metal	82.87% <71.02%> (-0.40%)	⬇️
6.1-m6a.metal	82.12% <71.02%> (-0.47%)	⬇️
6.1-m6g.metal	79.52% <75.00%> (-0.35%)	⬇️
6.1-m6i.metal	82.87% <71.02%> (-0.40%)	⬇️
6.1-m7a.metal-48xl	82.12% <71.02%> (?)
6.1-m7g.metal	79.52% <75.00%> (-0.35%)	⬇️
6.1-m7i.metal-24xl	82.88% <71.02%> (?)
6.1-m7i.metal-48xl	82.88% <71.02%> (?)
6.1-m8g.metal-24xl	79.52% <75.00%> (?)
6.1-m8g.metal-48xl	79.52% <75.00%> (?)

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