change: add alpha note to modrinth page

launcher/ui/pages/modplatform/modrinth/ModrinthPage.ui

@@ -11,6 +11,21 @@
    </rect>
   </property>
   <layout class="QVBoxLayout">
+   <item>
+    <widget class="QLabel" name="label_2">
+     <property name="font">
+      <font>
+       <italic>true</italic>
+      </font>
+     </property>
+     <property name="text">
+      <string>Note: Modrinth modpacks is still in alpha phase. Some things may be rough on the edges, or not working at all! Use it with caution.</string>
+     </property>
+     <property name="alignment">
+      <set>Qt::AlignCenter</set>
+     </property>
+    </widget>
+   </item>
    <item>
     <layout class="QHBoxLayout">
      <item>