Bump version in changelog.

CHANGELOG.md

@@ -17,6 +17,16 @@ Each section shall contain a list of action items of the following format: `<bri
 
 ### Added
 
+### Changed
+
+### Removed
+
+### Editorial Fixes
+
+## [1.1.0] - 2023-07-21
+
+### Added
+
 - Process requirement R1500 for consideration of clock misalignment ([#154](https://github.com/IHE/DEV.SDPi/issues/154)).
 - Use cases _Devices are operational in the MD LAN network but cannot access the TS Service_ and _Devices are operational in the MD LAN network but cannot access the TS Service and clock drift is unacceptable_ ([#155](https://github.com/IHE/DEV.SDPi/issues/155)). 
 - MDIB Efficiency clause ([#50](https://github.com/IHE/DEV.SDPi/issues/50)).