Adding burned GRT image (#260)

Author: MichaelMacaulay

pages/en/tokenomics.mdx

@@ -96,6 +96,8 @@ The initial token supply is 10 billion GRT, with a target of 3% new issuance ann
 
 The Graph is designed with multiple burning mechanisms to offset new token issuance. Approximately 1% of the GRT supply is burned annually through various activities on the network, and this number has been increasing as network activity continues to grow. These burning activities include a 0.5% delegation tax whenever a Delegator delegates GRT to an Indexer, a 1% curation tax when Curators signal on a subgraph, and a 1% of query fees for blockchain data.
 
+![Total burned GRT](/img/total-burned-grt.jpeg)
+
 In addition to these regularly occurring burning activities, the GRT token also has a slashing mechanism in place to penalize malicious or irresponsible behavior by Indexers. If an Indexer is slashed, 50% of their indexing rewards for the epoch are burned (while the other half goes to the fisherman), and their self-stake is slashed by 2.5%, with half of this amount being burned. This helps to ensure that Indexers have a strong incentive to act in the best interests of the network and to contribute to its security and stability.
 
 # Improving the Protocol