Update docs

contracts/utils/Context.sol

@@ -12,6 +12,8 @@ pragma solidity ^0.8.20;
  * is concerned).
  *
  * This contract is only required for intermediate, library-like contracts.
+ *
+ * @custom:stateless
  */
 abstract contract Context {
     function _msgSender() internal view virtual returns (address) {

contracts/utils/Multicall.sol

@@ -7,6 +7,8 @@ import {Address} from "./Address.sol";
 
 /**
  * @dev Provides a function to batch together multiple calls in a single external call.
+ *
+ * @custom:stateless
  */
 abstract contract Multicall {
     /**

contracts/utils/introspection/ERC165.sol

@@ -16,6 +16,8 @@ import {IERC165} from "./IERC165.sol";
  *     return interfaceId == type(MyInterface).interfaceId || super.supportsInterface(interfaceId);
  * }
  * ```
+ *
+ * @custom:stateless
  */
 abstract contract ERC165 is IERC165 {
     /**