fix : added '_disableInitializers()' in constructor

packages/dependency-royalty-management/contracts/RoyaltyManager.sol

@@ -23,6 +23,12 @@ contract RoyaltyManager is AccessControlUpgradeable, IRoyaltyManager {
     address internal _royaltySplitterCloneable;
     address internal _trustedForwarder;
 
+    /// @dev this protects the implementation contract from behing initialized.
+    /// @custom:oz-upgrades-unsafe-allow constructor
+    constructor() {
+        _disableInitializers();
+    }
+
     /// @notice initialization function for the deployment of contract
     /// @dev called during the deployment via the proxy.
     /// @param _commonRecipient the != address(0)common recipient for all the splitters

packages/dependency-royalty-management/contracts/RoyaltySplitter.sol

@@ -49,6 +49,12 @@ contract RoyaltySplitter is
     event ERC20Transferred(address indexed erc20Contract, address indexed account, uint256 amount);
     event RecipientSet(address indexed recipientAddress);
 
+    /// @dev this protects the implementation contract from behing initialized.
+    /// @custom:oz-upgrades-unsafe-allow constructor
+    constructor() {
+        _disableInitializers();
+    }
+
     /// @notice Query if a contract implements interface `id`.
     /// @param interfaceId the interface identifier, as specified in ERC-165.
     /// @return `true` if the contract implements `id`.