No changes needed - master to main updates already complete

[Copilot]

Investigated build failures on nab/update-pipelines branch. The master → main branch name updates are already complete and correct in both the base branch and main.

Findings

Build failures are unrelated to branch name changes:

• Python 3.13 pkaani tests fail with ImportError despite workflow installing pdb2pqr[pkaani]
• Identical failures exist on both main (commit 04930db) and nab/update-pipelines (commit 3031834)
• Same code passed all tests including Python 3.13 on Dec 7, 2025 (commit cbbffd0)
• Failures indicate external dependency regression between Dec 2025 and Feb 2026

Branch name updates status:

• Workflows updated: check-styles.yml, get_version.yml, python-package.yml
• Documentation updated: README.md codecov badge, CONTRIBUTING.md PR target branch
• All references to master branch changed to main

Root cause

Python 3.13 test failures are due to a breaking change in a pkaani dependency (torch/torchani/pkaani ecosystem), not the pipeline configuration. The workflow correctly installs dependencies but the import fails at runtime.

No code changes required for this PR as the master → main migration is already complete.

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