Update README.md

Fix incorrect closing tag within XML example
diff --git a/README.md b/README.md
index e420a08..8c77767 100644
--- a/README.md
+++ b/README.md
@@ -96,7 +96,7 @@
             android:layout_width="match_parent"
             android:layout_height="match_parent"/>
 
-    </RelativeLayout>
+    </LinearLayout>
 
 **3)** Now, in your fragment or activity, set the image resource, asset name or file path.