Fix variable shadowing in getDelegations

[mdqst]

In the provided code, there was a potential issue with variable shadowing in the getDelegations function. Specifically, the parameter addresses was used as the name of the array and then reused inside the map method, which could lead to confusion. This issue was fixed by renaming the inner variable in the map method.

The error:

const addressesLc = addresses.map((addresses) => addresses.toLowerCase());

The fix:

const addressesLc = addresses.map((address) => address.toLowerCase());

This change improves code readability and prevents potential bugs related to variable shadowing, ensuring that the code is easier to maintain and understand.