add dates to changelog

CHANGELOG.md

@@ -10,7 +10,7 @@ list yields a list of all related PRs for each release.
 
 # [unreleased]
 
-# [v1.15.0]
+# [v1.15.0] 27.10.2022
 
 - Consistent device file naming
 - Remove rad sensor from EM build, lead to weird bugs on EM which
@@ -26,14 +26,14 @@ list yields a list of all related PRs for each release.
 - P60 Module: Reduce number of set IDs, use same set IDs for core, auxiliary
   and config HK set across the three PCDU modules
 
-# [v1.14.1]
+# [v1.14.1] 11.10.2022
 
 - Various bugfixes and regression fixes
 - General file handling at program initialization now works properly again
 - Scratch buffer preferred SD card handling works again
 - Use scoped locks in TCS controller to avoid deadlocks
 
-# [v1.14.0]
+# [v1.14.0] 10.10.2022
 
 - Provide full SW update capability for the OBSW.
   This includes very basic CFDP integration, a software update