main/python3: disable test_minidom

main/python3/APKBUILD

@@ -125,6 +125,7 @@ EOF
 	fail="$fail test_runpy"					# fails on x86_64
 	fail="$fail test_threading"				# hangs on all arches (except x86_64?)
 	fail="$fail test_asyncio"				# hangs; routinely problematic (e.g. bpo-39101, bpo-41891, bpo-42183)
+	fail="$fail test_minidom"				# we fixed expat cves via backports, this thinks it's newer and fails
 
 	# kernel related
 	fail="$fail test_fcntl"					# wants DNOTIFY, we don't have it