docs: add release notes for v1.16.8-beta

Author: github-actions[bot]

release_notes/v1.16.8-beta.md

@@ -0,0 +1,23 @@
+## [1.16.8](https://github.com/NHSDigital/eps-prescription-status-update-api/compare/v1.16.7-beta...v1.16.8-beta) (2026-03-26)
+
+
+### Chore
+
+* [AEA-6055] - defer rollout of post-dated tests (#2913) ([b5bebe0](https://github.com/NHSDigital/eps-prescription-status-update-api/commit/b5bebe0109cf07389abd80eb2777914c327e861a))
+* [AEA-6055] - new index for post dated (#2910) ([c6c7c1f](https://github.com/NHSDigital/eps-prescription-status-update-api/commit/c6c7c1fb5ee6ec51170bb6ad714b010d076a9888))
+* [AEA-6358] - Enable notifications for CrxPatientApp system, remove their per-site enablement (#2907) ([b0a05ab](https://github.com/NHSDigital/eps-prescription-status-update-api/commit/b0a05abe556dd5a9a201223bc78b2955d4148ab3))
+
+### Fix
+
+* [AEA-6055] - debugging issues with post-dated updates (#2814) ([981257f](https://github.com/NHSDigital/eps-prescription-status-update-api/commit/981257f725f5c93450f9d2b2cfaf511890a40a91))
+
+### Upgrade
+
+* [dependabot] - bump requests from 2.32.5 to 2.33.0 (#2914) ([2746a1c](https://github.com/NHSDigital/eps-prescription-status-update-api/commit/2746a1cfd62ac26cd05d8df7bab654b22fab59ac))
+
+## Info
+[Release workflow run](https://github.com/NHSDigital/eps-prescription-status-update-api/actions/runs/23593724218) - Workflow ID: 23593724218
+
+It was initialized by [tstephen-nhs](https://github.com/tstephen-nhs)
+
+