Update docs

docs/modules/api/examples/access-control/AccessManagedERC20MintBase.sol

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+// SPDX-License-Identifier: MIT
+pragma solidity ^0.8.20;
+
+import {AccessManaged} from "@openzeppelin/contracts/access/manager/AccessManaged.sol";
+import {ERC20} from "@openzeppelin/contracts/token/ERC20/ERC20.sol";
+
+contract AccessManagedERC20Mint is ERC20, AccessManaged {
+    constructor(address manager) ERC20("MyToken", "TKN") AccessManaged(manager) {}
+
+    // Minting is restricted according to the manager rules for this function.
+    // The function is identified by its selector: 0x40c10f19.
+    // Calculated with bytes4(keccak256('mint(address,uint256)'))
+    function mint(address to, uint256 amount) public restricted {
+        _mint(to, amount);
+    }
+}