fix: Correct typo in ExponentialSearch filename

[imprince26]

This pull request resolves the typo in the ExponentalSearch.java file name, closing issue #7055.

Changes:

• Renamed src/main/java/com/thealgorithms/searches/ExponentalSearch.java to src/main/java/com/thealgorithms/searches/ExponentialSearch.java.

This change improves consistency within the codebase and makes the file easier to find.

---

• 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. (N/A - Not a new algorithm)
• 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 78.34%. Comparing base (4951fb9) to head (af0a74d).

Additional details and impacted files

@@            Coverage Diff            @@
##             master    #7056   +/-   ##
=========================================
  Coverage     78.34%   78.34%           
- Complexity     6665     6671    +6     
=========================================
  Files           753      753           
  Lines         22185    22185           
  Branches       4357     4356    -1     
=========================================
  Hits          17380    17380           
  Misses         4106     4106           
  Partials        699      699           

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