chore: fix typos in src/main/java/com/thealgorithms/datastructures/trees/BSTRecursiveGeneric.java

[khanhkhanhlele]

This PR fixes typos in the file src/main/java/com/thealgorithms/datastructures/trees/BSTRecursiveGeneric.java.

[codecov-commenter]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 78.32%. Comparing base (65eeb55) to head (93f6ed7).

Additional details and impacted files

@@             Coverage Diff              @@
##             master    #7030      +/-   ##
============================================
- Coverage     78.32%   78.32%   -0.01%     
+ Complexity     6651     6650       -1     
============================================
  Files           750      750              
  Lines         22143    22143              
  Branches       4350     4350              
============================================
- Hits          17344    17343       -1     
  Misses         4101     4101              
- Partials        698      699       +1     

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