git: Set trailer.where = end

Don't remember why I had to set it, or what problems I had without
(since it should be the default, no?), but does no harm.

.config/git/config

@@ -107,6 +107,8 @@
 	submodulesummary = true
 [submodule]
 	fetchJobs = 0
+[trailer]
+	where = end
 [user]
 	email = julian@druck.dev
 	name = Julian Prein