Set year to 2025 inside Copyright notice.

[gmmajal]

Relevant issue: #75

Background info: # any relevant background info for additional context, references to documentations etc.

• Each python script inside our repository comes with a Copyright notice specified at the top. The year specified in this notice needs to be updated.

Changes introduced: # list changes to the code repo made in this pull request

• The year inside each Copyright notice provided in this repository has been changed from 2024 to 2025.
• In one instance, docs/source/conf.py, the year provided was 2021 and it was changed to 2020.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 100.00%. Comparing base (a9aac8f) to head (6c6cb1f).
Report is 2 commits behind head on master.

Additional details and impacted files

@@            Coverage Diff            @@
##            master       #76   +/-   ##
=========================================
  Coverage   100.00%   100.00%           
=========================================
  Files           16        16           
  Lines          922       922           
=========================================
  Hits           922       922           

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