Fix incorrect absolute minimum calculation

[klerk1t]

• I have read CONTRIBUTING.md.
• This pull request is all my own work -- I have not plagiarized it.
• All filenames are in PascalCase.
• All functions and variable names follow Java naming conventions.
• All new algorithms have a URL in their comments that points to Wikipedia or other similar explanations.
• All new algorithms include a corresponding test class that validates their functionality.
• All new code is formatted with clang-format -i --style=file path/to/your/file.java

[codecov-commenter]

Codecov Report

❌ Patch coverage is 85.71429% with 1 line in your changes missing coverage. Please review.
✅ Project coverage is 80.32%. Comparing base (8a20fa9) to head (b8c0c4c).

Files with missing lines	Patch %	Lines
...main/java/com/thealgorithms/maths/AbsoluteMin.java	85.71%	0 Missing and 1 partial ⚠️

Additional details and impacted files

@@             Coverage Diff              @@
##             master    #7536      +/-   ##
============================================
- Coverage     80.32%   80.32%   -0.01%     
- Complexity     7402     7407       +5     
============================================
  Files           812      812              
  Lines         23911    23913       +2     
  Branches       4704     4706       +2     
============================================
+ Hits          19206    19207       +1     
- Misses         3944     3945       +1     
  Partials        761      761              

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