doc: create release notes

Signed-off-by: Jaime Silvela <jaime.silvela@enterprisedb.com>

ReleaseNotes.md

@@ -0,0 +1,22 @@
+# Release notes for CIclops
+
+History of user-visible changes in CIclops.
+
+For a complete list of changes, please refer to the
+[commits](https://github.com/cloudnative-pg/ciclops/commits/main)
+on the `main` branch in GitHub.
+
+## Version 1.1.0
+
+**Release date:** Feb 20, 2023
+
+Improvements:
+
+- Make CIclops resilient to JSON files without the expected schema (#1)
+- Add new tables to show failing code location, and whole-suite durations (#2)
+
+## Version 1.0.0
+
+**Release date:** Nov 22, 2022
+
+Initial release of the CIclops GitHub action in the CloudNativePG project.