Creating release notes for version 8.7.8

Author: alexanderrichards

ganga/GangaRelease/ReleaseNotes-8.7.8

@@ -0,0 +1,18 @@
+**************************************************************************************************************
+8.7.8 (2024/06/25)
+
+--------------------------------------------------------------------------------------------------------------
+ganga/ganga/GangaCore
+--------------------------------------------------------------------------------------------------------------
+* Fix master job kill with failed subjobs #2366 
+
+--------------------------------------------------------------------------------------------------------------
+ganga/ganga/GangaDirac
+--------------------------------------------------------------------------------------------------------------
+* Remove unused finaliseOnMaster #2363 
+
+--------------------------------------------------------------------------------------------------------------
+ganga/ganga/GangaLHCb
+--------------------------------------------------------------------------------------------------------------
+* Add optional retry limit for BKQuery. Default set to 1. #2364 
+* Apptainer fix for very old applications #2359