fix(docs): update evm version image

Author: nikerzetic-aflabs

docs/network/guides/secure-random-numbers.mdx

@@ -105,7 +105,7 @@ In addition to the `randomNumber` itself, two other variables are retrieved:
 
 - `timestamp`: The UNIX timestamp marking the end of the voting epoch during which data was collected from data providers to generate the specific number. Each voting epoch lasts for a fixed 90-second window.
 
-:::warning[Set EVM Version to shanghai]
+:::warning[Set EVM Version to Shanghai]
 
 - **Using Remix:** Set EVM version to `shanghai` in the **Advanced Configurations** section of the **Solidity Compiler** tab: