docs: add release notes for v1.16.12-beta

Author: github-actions[bot]

release_notes/v1.16.12-beta.md

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+## [1.16.12](https://github.com/NHSDigital/eps-prescription-status-update-api/compare/v1.16.11-beta...v1.16.12-beta) (2026-04-21)
+
+
+### Chore
+
+* [AEA-0000] - add dependabot approve schedule (#2983) ([9f4d47b](https://github.com/NHSDigital/eps-prescription-status-update-api/commit/9f4d47b26da70492df6b612468c9a4ce94410350))
+* [AEA-0000] - bump dev container version to 1.4.8 (#2972) ([4a722ee](https://github.com/NHSDigital/eps-prescription-status-update-api/commit/4a722ee02b374bc6ea25a9f530fc5fa98d110bda))
+* [AEA-0000] - Default to using the app ID. Populate the parameter with the enabled suppliers (#2970) ([8b4d984](https://github.com/NHSDigital/eps-prescription-status-update-api/commit/8b4d98419e040cba094b39354fc9e3586a182fba))
+* [AEA-0000] - use gitleaks for secret scanning (#2973) ([499cd67](https://github.com/NHSDigital/eps-prescription-status-update-api/commit/499cd67e8f4ee3f9800ce77ffbe2a6f792c3ed28))
+* [AEA-6055] - use latest regression tests (#2971) ([7b17865](https://github.com/NHSDigital/eps-prescription-status-update-api/commit/7b1786583a4069497502abd0b92b2d6aee097a79))
+* [AEA-6540] - enable notifications for all except list for next supplier (#2984) ([5b6457a](https://github.com/NHSDigital/eps-prescription-status-update-api/commit/5b6457a9c6b3962eb8e5b848a44e321097d67dff))
+
+### Docs
+
+* [AEA-0000] - update links to related apis (#2966) ([3ea60be](https://github.com/NHSDigital/eps-prescription-status-update-api/commit/3ea60bea159ea6f1e82a714552cfb99aaf686b76))
+* [AEA-6528] - Update the OAS file to say the PSU is in Beta (#2968) ([c7babdc](https://github.com/NHSDigital/eps-prescription-status-update-api/commit/c7babdc5e630f4ad4e15e1c52c2bb639e51066ff))
+
+### Upgrade
+
+* [dependabot] - bump actions/github-script from 8.0.0 to 9.0.0 (#2978) ([32e02de](https://github.com/NHSDigital/eps-prescription-status-update-api/commit/32e02de2809bc8cfba5b3321c53167e16f68e760))
+* [dependabot] - bump actions/upload-artifact from 7.0.0 to 7.0.1 (#2981) ([f94e1f0](https://github.com/NHSDigital/eps-prescription-status-update-api/commit/f94e1f0eac069621e7db97fa0ad2f01eed3cc3dd))
+* [dependabot] - bump aws-actions/configure-aws-credentials from 6.0.0 to 6.1.0 (#2975) ([2b21ee3](https://github.com/NHSDigital/eps-prescription-status-update-api/commit/2b21ee3e02c7421bfe2fa14fc2d2c6cdda153980))
+* [dependabot] - bump click from 8.3.1 to 8.3.2 (#2974) ([dfa3de9](https://github.com/NHSDigital/eps-prescription-status-update-api/commit/dfa3de94bce40e201ca76186a79bcb654c1593a5))
+* [dependabot] - bump NHSDigital/eps-common-workflows/.github/workflows/dependabot-auto-approve-and-merge.yml from 6.0.2 to 6.0.6 (#2982) ([c64d5d0](https://github.com/NHSDigital/eps-prescription-status-update-api/commit/c64d5d0b30b345a233508f0524673c3bbe87e29d))
+* [dependabot] - bump NHSDigital/eps-common-workflows/.github/workflows/get-repo-config.yml from 6.0.2 to 6.0.6 (#2976) ([bd1d86d](https://github.com/NHSDigital/eps-prescription-status-update-api/commit/bd1d86d2c7f6b6c3215f51751f78ab4516590710))
+* [dependabot] - bump NHSDigital/eps-common-workflows/.github/workflows/pr_title_check.yml from 6.0.2 to 6.0.6 (#2980) ([7e5034f](https://github.com/NHSDigital/eps-prescription-status-update-api/commit/7e5034f2ffa2190e20f4019cc00e20c7f99a4edc))
+* [dependabot] - bump NHSDigital/eps-common-workflows/.github/workflows/tag-release-devcontainer.yml from 6.0.2 to 6.0.6 (#2977) ([8655150](https://github.com/NHSDigital/eps-prescription-status-update-api/commit/86551509a4edf6154eeb521c2447fc2250196a26))
+* [dependabot] - bump NHSDigital/eps-update-devcontainer from 1.0.2 to 1.0.4 (#2979) ([cf9e3d7](https://github.com/NHSDigital/eps-prescription-status-update-api/commit/cf9e3d7a63736f51cf40aff0fd84df7fe5b64e04))
+* [dependabot] - bump pytest from 9.0.2 to 9.0.3 (#2967) ([a817268](https://github.com/NHSDigital/eps-prescription-status-update-api/commit/a817268d85f46a7aad67640fe81931cdac24fa5a))
+* [dependabot] - bump vitest from 3.2.4 to 4.1.2 (#2959) ([252b33e](https://github.com/NHSDigital/eps-prescription-status-update-api/commit/252b33e650d3157f770375d668828c857566b037))