docs: add release notes for v1.1.1

Author: github-actions[bot]

release_notes/v1.1.1.md

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+## [1.1.1](https://github.com/NHSDigital/eps-devcontainers/compare/v1.1.0...v1.1.1) (2026-02-27)
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+### Chore
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+* [AEA-0000] - more supressions (#33) ([3d93fcc](https://github.com/NHSDigital/eps-devcontainers/commit/3d93fcc1d49d01284b06e1b87953127c332e917c))
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+## Info
+[Release workflow run](https://github.com/NHSDigital/eps-devcontainers/actions/runs/22484075435) - Workflow ID: 22484075435
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+It was initialized by [anthony-nhs](https://github.com/anthony-nhs)
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