Add removal of URLtrigger cache

because we want to run another round of updates
from the same Tumbleweed version.

Makefile

@@ -76,7 +76,7 @@ newsnapshot4: # with new $slobuild
 
 	##echo "adapt and run tools/syncbase | bash -x"
 	find out/pending/ -mtime +1 -delete
-	rm cache/changelog/* cache/changelogdiff/*
+	rm -f cache/changelog/* cache/changelogdiff/* cache/triggeronurlchange/http*
 	##echo "enable keepobsolete Flag in https://build.opensuse.org/projects/openSUSE:Slowroll/prjconf" # leave enabled. When publishing is enabled, it does not matter.
 	# osc copypac openSUSE:Factory kiwi-templates-Minimal $slobuild # for openQA # needs adaptation
 	#for p in $(osc ls $slo) ; do echo "$p"; tools/syncslo-postbump "$p" ; done | tee out/log/syncslo-postbump-$(date -I)