GB: Extend to cover DMG channels 5 & 6

OFCOM extended the DMG band to include till 71GHz.

Signed-off-by: Chaitanya Tata <chaitanya.mgit@gmail.com>
Signed-off-by: Seth Forshee <seth.forshee@canonical.com>
diff --git a/db.txt b/db.txt
index c5b9511..4620e39 100644
--- a/db.txt
+++ b/db.txt
@@ -587,6 +587,7 @@
 # Harmonized CEPT countries (July 2019): https://www.ecodocdb.dk/download/25c41779-cd6e/Rec7003e.pdf
 # GB: https://www.ofcom.org.uk/__data/assets/pdf_file/0019/136009/Ofcom-Information-Sheet-5-GHz-RLANs.pdf
 # GB: https://www.ofcom.org.uk/__data/assets/pdf_file/0028/84970/ir-2030.pdf
+# GB: https://www.ofcom.org.uk/__data/assets/pdf_file/0013/126121/Statement_Implementing-Ofcoms-decision-on-the-57-71GHz-band.pdf
 country GB: DFS-ETSI
 	(2400 - 2483.5 @ 40), (100 mW)
 	(5150 - 5250 @ 80), (200 mW), NO-OUTDOOR, AUTO-BW, wmmrule=ETSI
@@ -594,8 +595,8 @@
 	(5470 - 5725 @ 160), (500 mW), DFS, wmmrule=ETSI
 	# short range devices (ETSI EN 300 440-1)
 	(5725 - 5875 @ 80), (25 mW)
-	# 60 GHz band channels 1-4 (ETSI EN 302 567)
-	(57000 - 66000 @ 2160), (40)
+	# 60 GHz band channels 1-6
+	(57000 - 71000 @ 2160), (40)
 
 country GD: DFS-FCC
 	(2402 - 2472 @ 40), (30)