add game master dao (solana-labs#1896)

public/realms/mainnet-beta.json

@@ -99,6 +99,20 @@
     "discord": "https://discord.com/invite/2uwjsBc5yw",
     "github": "https://github.com/blockworks-foundation/"
   },
+  {
+    "symbol": "MNGO-GM",
+    "category": "defi",
+    "displayName": "Mango Game Master",
+    "programId": "GqTPL6qRf5aUuqscLh8Rg2HTxPUXfhhAXDptTLhp1t2J",
+    "realmId": "6JFaFouiN4ssPc38ey1hXKSxyFWZzZy9w5Xt5xLzeozm",
+    "ogImage": "https://i.imgur.com/448n6bC.jpg",
+    "shortDescription": "Every market, all the power, none of the fuss. Simplifying decentralized finance through easy-to-use products and developer tools.",
+    "website": "https://mango.markets",
+    "keywords": "Mango Markets, REALM, Governance, Serum, SRM, Serum DEX, DEFI, Decentralized Finance, Decentralised Finance, Crypto, ERC20, Ethereum, Decentralize, Solana, SOL, SPL, Cross-Chain, Trading, Fastest, Fast, SerumBTC, SerumUSD, SRM Tokens, SPL Tokens",
+    "twitter": "@mangomarkets",
+    "discord": "https://discord.com/invite/2uwjsBc5yw",
+    "github": "https://github.com/blockworks-foundation/"
+  },
   {
     "symbol": "Metaplex",
     "bannerImage": "https://dao.metaplex.com/img/bg-metaplex.svg",