Add missing docstrings (#5168)

Co-authored-by: Ernesto García <ernestognw@gmail.com>
Signed-off-by: Hadrien Croubois <hadrien.croubois@gmail.com>

contracts/proxy/ERC1967/ERC1967Utils.sol

@@ -9,7 +9,7 @@ import {Address} from "../../utils/Address.sol";
 import {StorageSlot} from "../../utils/StorageSlot.sol";
 
 /**
- * @dev This abstract contract provides getters and event emitting update functions for
+ * @dev This library provides getters and event emitting update functions for
  * https://eips.ethereum.org/EIPS/eip-1967[ERC-1967] slots.
  */
 library ERC1967Utils {

contracts/proxy/transparent/TransparentUpgradeableProxy.sol

@@ -15,7 +15,13 @@ import {ProxyAdmin} from "./ProxyAdmin.sol";
  * include them in the ABI so this interface must be used to interact with it.
  */
 interface ITransparentUpgradeableProxy is IERC1967 {
-    function upgradeToAndCall(address, bytes calldata) external payable;
+    /**
+     * @dev Upgrade the implementation of the proxy to `newImplementation`, and subsequently execute the function call
+     * encoded in `data`.
+     *
+     * See {UUPSUpgradeable-upgradeToAndCall}
+     */
+    function upgradeToAndCall(address newImplementation, bytes calldata data) external payable;
 }
 
 /**