umoci: update to get tar writing fix

[mikemccracken]

move umoci version to the commit with the fix for correctly closing tarwriter in all cases, avoiding creation of layers that make gnu tar sad.

What type of PR is this?
bug

Which issue does this PR fix:

$ tar tvzf oci/blobs/sha256/bc7f2c15116d3da36aa493221dcf736cbe027f64f3e32b157aafb83da7cba35e
...
-rw-r--r-- 0/0 32064 2024-02-21 19:44 var/log/faillog
-rw-rw-r-- 0/43 292584 2024-02-21 19:44 var/log/lastlog
tar: Unexpected EOF in archive
tar: Error is not recoverable: exiting now

What does this PR do / Why do we need it:

while golang based container tools ignore this EOF, which is fine because it only happens after the last file has been read, many scanners use gnu tar, which errors out and can cause problems.

If an issue # is not available please add repro steps and logs showing the issue:

see project-stacker/umoci#4

Testing done on this change:

see project-stacker/umoci#4

Will this break upgrades or downgrades?
no

Does this PR introduce any user-facing change?:
no

By submitting this pull request, I confirm that my contribution is made under the terms of the Apache 2.0 license.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 57.15%. Comparing base (e627e90) to head (1155f43).

Additional details and impacted files

@@           Coverage Diff           @@
##             main     #597   +/-   ##
=======================================
  Coverage   57.15%   57.15%           
=======================================
  Files          64       64           
  Lines        7525     7525           
=======================================
  Hits         4301     4301           
  Misses       2481     2481           
  Partials      743      743           

☔ View full report in Codecov by Sentry.
📢 Have feedback on the report? Share it here.