fix(io): explicitly declare UTF-8 encoding in IO operations

[Guts]

No description provided.

[sonarcloud]

Quality Gate passed

Issues
0 New issues
0 Accepted issues

Measures
0 Security Hotspots
No data about Coverage
0.0% Duplication on New Code

See analysis details on SonarCloud

[codecov-commenter]

Codecov Report

Attention: Patch coverage is 87.50000% with 1 line in your changes missing coverage. Please review.

Project coverage is 71.10%. Comparing base (8dfd749) to head (016e8e6).
Report is 2 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main     #520   +/-   ##
=======================================
  Coverage   71.10%   71.10%           
=======================================
  Files          49       49           
  Lines        3084     3084           
  Branches      664      664           
=======================================
  Hits         2193     2193           
  Misses        700      700           
  Partials      191      191           

Flag	Coverage Δ
unittests	70.49% <87.50%> (ø)

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Files	Coverage Δ
qgis_deployment_toolbelt/plugins/plugin.py	78.41% <100.00%> (ø)
...s_deployment_toolbelt/profiles/qgis_ini_handler.py	69.78% <100.00%> (ø)
...s_deployment_toolbelt/scenarios/scenario_reader.py	60.00% <100.00%> (ø)
qgis_deployment_toolbelt/utils/linux_utils.py	81.29% <100.00%> (ø)
qgis_deployment_toolbelt/shortcuts/shortcuts.py	65.67% <0.00%> (ø)