[MAINT] bump codecov version

[jdkent]

Closes # .

Changes proposed in this pull request:

• made token not required here: https://app.codecov.io/account/gh/neurostuff/org-upload-token

Summary by Sourcery

CI:

• Update Codecov GitHub Action from version 4 to version 5 in the CI workflow.

[sourcery-ai]

Reviewer's Guide by Sourcery

This PR updates the CodeCov GitHub Action from version 4 to version 5 in the CI workflow. The change is straightforward and only involves a version bump in the workflow configuration file.

No diagrams generated as the changes look simple and do not need a visual representation.

File-Level Changes

Change	Details	Files
Update CodeCov GitHub Action version	Bump codecov-action from v4 to v5 Maintain existing configuration for fail_ci_if_error and environment variables	.github/workflows/testing.yml

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[sourcery-ai]

Hey @jdkent - I've reviewed your changes - here's some feedback:

Overall Comments:

• Please fill out the PR description more completely, including the issue number if applicable and the motivation for upgrading codecov-action (e.g., new features, bug fixes, etc.).

Here's what I looked at during the review

• 🟢 General issues: all looks good
• 🟡 Security: 1 issue found
• 🟢 Testing: all looks good
• 🟢 Complexity: all looks good
• 🟢 Documentation: all looks good

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[sourcery-ai]

🚨 suggestion (security): Consider pinning the codecov-action to a specific SHA instead of using a version tag

Using SHA pinning for GitHub Actions provides better security against supply chain attacks and ensures reproducible builds. You can find the SHA in the action's release page.

Suggested change

	uses: codecov/codecov-action@v5
	uses: codecov/codecov-action@e0b68c0bf7215e3f6d54c0455fbd8a4201d259dd

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 88.23%. Comparing base (52400d3) to head (2f81609).
Report is 3 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main     #908   +/-   ##
=======================================
  Coverage   88.23%   88.23%           
=======================================
  Files          48       48           
  Lines        6382     6382           
=======================================
  Hits         5631     5631           
  Misses        751      751           

☔ View full report in Codecov by Sentry.
📢 Have feedback on the report? Share it here.

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