added 23-DM-C5 UNIFAC groups

[EvenSol]

Pull Request

Thank you for contributing to NeqSim! Please complete the following checklist before requesting review:

• Confirm ./mvnw test runs successfully
• Verify code formatting using Checkstyle
• Update any relevant docs/README
• Link to an associated issue or discussion

See CONTRIBUTING.md for the full contribution process.

[codecov-commenter]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 43.90%. Comparing base (48bafd2) to head (7b8005f).
⚠️ Report is 278 commits behind head on master.

Additional details and impacted files

@@             Coverage Diff              @@
##             master    #1433      +/-   ##
============================================
- Coverage     43.92%   43.90%   -0.03%     
+ Complexity     7174     7159      -15     
============================================
  Files           785      785              
  Lines         75346    75288      -58     
  Branches       9252     9231      -21     
============================================
- Hits          33097    33052      -45     
+ Misses        40020    40014       -6     
+ Partials       2229     2222       -7     

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