clipboard history: make updates happen immediately after change

Updates previously wouldn't trigger immediately because no focus = no clipboard grab
https://quickshell.org/docs/v0.2.0/types/Quickshell/Quickshell/#clipboardText

.config/quickshell/ii/services/Cliphist.qml

@@ -98,4 +98,12 @@ Singleton {
             }
         }
     }
+
+    IpcHandler {
+        target: "cliphistService"
+
+        function update(): void {
+            root.refresh()
+        }
+    }
 }