chore: fix typo in contract name

Because having the contract and file names differ in casing on a single letter is prone to errors.

contracts/script/DeployEigenLayerCore.s.sol

@@ -6,7 +6,7 @@ import {Script} from "forge-std/Script.sol";
 import {CoreDeploymentLib} from "./utils/CoreDeploymentLib.sol";
 import {UpgradeableProxyLib} from "./utils/UpgradeableProxyLib.sol";
 
-contract DeployEigenlayerCore is Script {
+contract DeployEigenLayerCore is Script {
     using CoreDeploymentLib for *;
     using UpgradeableProxyLib for address;