Fix warning and update llama.cpp submodule to latest.

llama.cpp

@@ -1 +1 @@
-Subproject commit 2f7c8e014e3c0ceaf39688845c2ff6f919fb03b7
+Subproject commit 6a9661ea5ad72166b700ae5e87976e4452499dda

main.qml

@@ -929,7 +929,7 @@ Window {
                 Accessible.role: Accessible.EditableText
                 Accessible.name: placeholderText
                 Accessible.description: qsTr("Textfield for sending messages/prompts to the model")
-                Keys.onReturnPressed: {
+                Keys.onReturnPressed: (event)=> {
                     if (event.modifiers & Qt.ControlModifier || event.modifiers & Qt.ShiftModifier)
                         event.accepted = false;
                     else