release notes for v0.5.0

RELEASE_NOTES

@@ -1,6 +1,21 @@
 This file contains a description of the major changes to the EESSI
 build-and-deploy bot. For more detailed information, please see the git log.
 
+v0.5.0 (16 May 2024)
+--------------------------
+
+This is a minor release of the EESSI build-and-deploy bot.
+
+Improvements:
+* list authors in source code files where applicable (#261)
+* make display of build targets more concise (#262)
+* use _bot_jobJOBID.result files created by bot/check-build.sh when determining
+  which build artefacts should be deployed (#263)
+  * this makes the bot fully agnostic to what it builds
+* reorganise declaration, initialisation and use of string constants _and_ verify
+* that required configuration settings are defined in 'app.cfg' (#266)
+
+
 v0.4.0 (28 February 2024)
 --------------------------