Bug#994121: debian-cd: Default CODENAME should be changed to bookworm (testing)

[Daniel Lewart <lewart3@gmail.com>]

Makefile patch is attached.  Dan

--- a/Makefile	2021-09-06 05:22:44.000000000 -0500
+++ b/Makefile	2021-09-12 00:00:00.000000000 -0500
@@ -191,14 +191,14 @@
 	fi
 endif
 
-# Make sure unstable/sid points to testing/buster, as there is no build
+# Make sure unstable/sid points to testing/bookworm, as there is no build
 # rule for unstable/sid.
 unstable-map:
 	$(Q)if [ ! -d $(BASEDIR)/data/sid ] ; then \
-		ln -s buster $(BASEDIR)/data/sid ; \
+		ln -s bookworm $(BASEDIR)/data/sid ; \
 	fi
 	$(Q)if [ ! -d $(BASEDIR)/tools/boot/sid ] ; then \
-		ln -s buster $(BASEDIR)/tools/boot/sid ; \
+		ln -s bookworm $(BASEDIR)/tools/boot/sid ; \
 	fi
 
 #################