[BUG] Infinite Loop in Swap Sort Implementation

[alxkm]

Description

Description
The current implementation of the Swap Sort algorithm can enter an infinite loop, particularly when dealing with arrays containing duplicate values. This issue was observed in the test case shouldAcceptWhenArrayWithDuplicateValueIsPassed.

Problem
The index variable in the sorting logic is not being updated correctly. As a result, the index may never reach len - 1, causing the algorithm to loop indefinitely.

Solution
Fix the logic to ensure the index variable is updated appropriately.
Add the missing test case to validate the sorting of arrays with duplicate values.
Steps to Reproduce

Steps to reproduce

Run the test case shouldAcceptWhenArrayWithDuplicateValueIsPassed.
Observe that the algorithm enters an infinite loop.
Expected Behavior

Excepted behavior

The algorithm should sort the array correctly and terminate without entering an infinite loop.

Screenshots

No response

Additional context

No response

[alxkm]

A pull request addressing this issue has already been created.

#5248