Update DEVSTACK_SERIES to 2024.2

stable/2024.1 branch has been created now and
current master is for 2024.2.

Change-Id: I4af9e87318ef9cbfede7df7c23872a1a7e38c820
diff --git a/stackrc b/stackrc
index 4e49b46..de81f01 100644
--- a/stackrc
+++ b/stackrc
@@ -257,7 +257,7 @@
 # Setting the variable to 'ALL' will activate the download for all
 # libraries.
 
-DEVSTACK_SERIES="2024.1"
+DEVSTACK_SERIES="2024.2"
 
 ##############
 #