add manual patch for immutable variable in UUPSUpgradeable

scripts/upgradeable/patch/06-add-immutable-self.patch

+diff --git a/contracts/proxy/utils/UUPSUpgradeable.sol b/contracts/proxy/utils/UUPSUpgradeable.sol
+index a9568729..860e66d7 100644
+--- a/contracts/proxy/utils/UUPSUpgradeable.sol
++++ b/contracts/proxy/utils/UUPSUpgradeable.sol
+@@ -24,10 +24,9 @@ abstract contract UUPSUpgradeable is Initializable, ERC1967UpgradeUpgradeable {
+     }
+ 
+     function __UUPSUpgradeable_init_unchained() internal initializer {
+-        __self = address(this);
+     }
+     /// @custom:oz-upgrades-unsafe-allow state-variable-immutable state-variable-assignment
+-    address private __self;
++    address private immutable __self = address(this);
+ 
+     /**
+      * @dev Check that the execution is being performed through a delegatecall call and that the execution context is