feat: Ch06 Digital Filters

Signed-off-by: Philipp Le <philipp@philipple.de>
Change-Id: I2dce67a8fe4409865369146eba8be7f60ec52b11
diff --git a/dcs/frames/groups.py b/dcs/frames/groups.py
index b3c8d10..4a5a0f2 100644
--- a/dcs/frames/groups.py
+++ b/dcs/frames/groups.py
@@ -21,3 +21,7 @@
 
 class Ch05Group(Group):
     NAME = 'Chapter 05'
+
+
+class Ch06Group(Group):
+    NAME = 'Chapter 06'