docs: add release notes for v5.8.0

Author: github-actions[bot]

release_notes/v5.8.0.md

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+# [5.8.0](https://github.com/NHSDigital/eps-common-workflows/compare/v5.7.1...v5.8.0) (2026-03-19)
+
+
+### New
+
+* [AEA-5986] - Add pypi publishing to tag-release-devcontainer workflow (#94) ([cd3cf9f](https://github.com/NHSDigital/eps-common-workflows/commit/cd3cf9fa582d391ce9c50b10c43155eb48ca65e3))
+
+## Info
+[Release workflow run](https://github.com/NHSDigital/eps-common-workflows/actions/runs/23289951377) - Workflow ID: 23289951377
+
+It was initialized by [anthony-nhs](https://github.com/anthony-nhs)
+
+