set Hand pointer icon on hover over Send button in Chat example (#5244)

Fixes CMP-6651

## Testing
Run chat example

## Release Notes
N/A

Author: kropp

examples/chat/shared/src/commonMain/kotlin/SendMessage.kt

@@ -18,6 +18,8 @@ import androidx.compose.runtime.setValue
 import androidx.compose.ui.Alignment
 import androidx.compose.ui.Modifier
 import androidx.compose.ui.graphics.Color
+import androidx.compose.ui.input.pointer.PointerIcon
+import androidx.compose.ui.input.pointer.pointerHoverIcon
 import androidx.compose.ui.unit.dp
 
 @Composable
@@ -43,6 +45,7 @@ fun SendMessage(sendMessage: (String) -> Unit) {
                             sendMessage(inputText)
                             inputText = ""
                         }
+                        .pointerHoverIcon(PointerIcon.Hand)
                         .padding(10.dp),
                     verticalAlignment = Alignment.CenterVertically,
                 ) {