Improve rotated binary search edge cases

[sohamcodes-ctrl]

• 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 50.00000% with 1 line in your changes missing coverage. Please review.
✅ Project coverage is 81.64%. Comparing base (ed2928f) to head (18c8bc0).

Files with missing lines	Patch %	Lines
...om/thealgorithms/searches/RotatedBinarySearch.java	50.00%	0 Missing and 1 partial ⚠️

Additional details and impacted files

@@             Coverage Diff              @@
##             master    #7623      +/-   ##
============================================
- Coverage     81.65%   81.64%   -0.01%     
- Complexity     8165     8168       +3     
============================================
  Files           837      837              
  Lines         25653    25655       +2     
  Branches       5009     5009              
============================================
+ Hits          20946    20947       +1     
  Misses         3922     3922              
- Partials        785      786       +1     

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