Update dark theme UI

assets/minecraft/textures/gui/sprites/social_interactions/background.png.mcmeta

@@ -0,0 +1,10 @@
+{
+    "gui": {
+        "scaling": {
+            "type": "nine_slice",
+            "width": 236,
+            "height": 34,
+            "border": 8
+        }
+    }
+}