Update: conda env file name and apply black formatting to ensure tests pass

[MilagrosMarin]

This pull request introduces a new patch release (version 0.4.5) focused on improving consistency and code formatting across the project. The most significant changes include renaming an environment file for consistency, updating the version number, and applying formatting fixes to ensure tests pass.

Release and consistency updates:

• Renamed env.yml to conda_env.yml to align with naming conventions used in other projects.
• Updated the version number in element_array_ephys/version.py from 0.4.4 to 0.4.5.

Code formatting and tutorial improvements:

• Reformatted code in notebooks/tutorial.ipynb for better readability and compliance with code style guidelines (e.g., splitting long lines, adding blank lines). This ensures tests pass after previous updates. [1] [2]