refactor: fix typo

[alxkm]

There are two typos in javadocs in TwinPrime and StringCompression

• 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 code is formatted with clang-format -i --style=file path/to/your/file.java

[codecov-commenter]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 45.88%. Comparing base (56f97c4) to head (bd9d0ee).

Additional details and impacted files

@@             Coverage Diff              @@
##             master    #5363      +/-   ##
============================================
- Coverage     45.89%   45.88%   -0.02%     
  Complexity     2857     2857              
============================================
  Files           525      525              
  Lines         15418    15418              
  Branches       2917     2917              
============================================
- Hits           7076     7074       -2     
- Misses         8047     8048       +1     
- Partials        295      296       +1     

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