docs: add release notes for v1.0.1

Author: github-actions[bot]

release_notes/v1.0.1.md

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+## [1.0.1](https://github.com/NHSDigital/eps-update-devcontainer/compare/v1.0.0...v1.0.1) (2026-04-01)
+
+
+### Chore
+
+* [AEA-0000] - add sync copilot and check commit signing pre-commit hook (#2) ([ff664c6](https://github.com/NHSDigital/eps-update-devcontainer/commit/ff664c6debd2d8ca9ae5ced1c746b31a18f1d25c))
+* [AEA-0000] - fix branch in sync copilot (#3) ([4694829](https://github.com/NHSDigital/eps-update-devcontainer/commit/4694829857f3782412525ce83d64fc5065e5d85d))
+
+### Upgrade
+
+* [dependabot] - sync Copilot instructions (#4) ([2a1141a](https://github.com/NHSDigital/eps-update-devcontainer/commit/2a1141a51b5bb8012904fb385fa364c781d1bfdc))
+
+## Info
+[Release workflow run](https://github.com/NHSDigital/eps-update-devcontainer/actions/runs/23843210013) - Workflow ID: 23843210013
+
+It was initialized by [anthony-nhs](https://github.com/anthony-nhs)
+
+