Update oracle.mdx

Author: Dogandi

concepts/oracle.mdx

@@ -39,7 +39,7 @@ _After the bidder's actions, the provider proceeds to:_
 When a bid for a transaction (txnj) is circulated through the mev-commit p2p network and the provider has made a commitment, the oracle is activated to verify whether the provider has honored this commitment.
 
 <Frame>
-  <img src="/images/oracle.png" />
+  <img src="/images/Oracle.png" />
 </Frame>
 
 The process is as follows: