Doc: Update sponsors

packages/tools/cspell/dictionary4.txt

@@ -201,4 +201,5 @@ Daman
 vikasmanimc
 traspire
 Pokies
-Pokiesman
+Pokiesman
+Gamstop

packages/tools/sponsors.json

@@ -159,6 +159,12 @@
 			"title": "Boost your reach and buy real followers",
 			"imageName": "SocialKings.png",
 			"alt": "Boost your reach and buy real followers"
+		},
+		{
+			"url": "https://uk.notgamstop.com/bonuses/free-spins-no-deposit-no-gamstop/",
+			"title": "free spins no deposit at NotGamstop",
+			"imageName": "NotGamStop.jpg",
+			"alt": "free spins no deposit at NotGamstop"
 		}
 	]
 }