[Rspamd] Adjust CAB score detection

Adjust CAB score detection, as CAB content can't be extracted by Rspamd

data/conf/rspamd/local.d/mime_types.conf

@@ -14,7 +14,7 @@ bad_extensions = {
   ps1 = 4,
   ace = 4,
   arj = 4,
-  cab = 3,
+  cab = 20,
   vbs = 20,
   hta = 4,
   shs = 4,
@@ -42,6 +42,5 @@ archive_extensions = {
   arj = 1,
   rar = 1,
   ace = 1,
-  7z = 1,
-  cab = 1
+  7z = 1
 };