Remove duplicate SHA256SUM from release artifacts

[MrAlias]

No description provided.

[Copilot]

Pull request overview

This pull request removes the creation of a duplicate SHA256SUMS file with a version suffix. The Makefile was creating both SHA256SUMS and SHA256SUMS-<version> (a copy of the former), which was unnecessary duplication.

Changes:

• Removed the line that copies SHA256SUMS to SHA256SUMS-<version> in the Makefile's release target

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[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 44.32%. Comparing base (431a3ca) to head (54ceeb2).
⚠️ Report is 2 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #1336      +/-   ##
==========================================
+ Coverage   43.56%   44.32%   +0.76%     
==========================================
  Files         307      306       -1     
  Lines       32888    27760    -5128     
==========================================
- Hits        14329    12306    -2023     
+ Misses      17641    14721    -2920     
+ Partials      918      733     -185     

Flag	Coverage Δ
integration-test	?
integration-test-arm	?
integration-test-vm-x86_64-5.15.152	?
integration-test-vm-x86_64-6.10.6	?
k8s-integration-test	?
oats-test	?
unittests	44.32% <ø> (-0.03%)	⬇️

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