fix: a small bug in code coverage CLI helper

Description

The result of running the following command python ..\sight-git\sight-cov.py -d my_project_name 506 --html in the project root directory on Windows platform :

Technical specifications

Specifying the encoding when opening the file.

Test plan

Executes the command in the Description section

Edited Nov 13, 2024 by Nicolas PAPIER

To upload designs, you'll need to enable LFS and have an admin enable hashed storage. More information