docs: add release notes for v5.4.4

Author: github-actions[bot]

release_notes/v5.4.4.md

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+## [5.4.4](https://github.com/NHSDigital/eps-common-workflows/compare/v5.4.3...v5.4.4) (2026-02-20)
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+### Upgrade
+
+* [dependabot] - bump tar and npm (#71) ([9bd4c61](https://github.com/NHSDigital/eps-common-workflows/commit/9bd4c61136daf4698e18b8ef2493a7465eb6b773))
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+
+
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+## Info
+[Release workflow run](https://github.com/NHSDigital/eps-common-workflows/actions/runs/22216158967) - Workflow ID: 22216158967
+
+It was initialized by [eps-autoapprove-dependabot[bot]](https://github.com/apps/eps-autoapprove-dependabot)
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+