contrib/android: fix a typo in the website link box

Not sure it actually ever broke something but recent Android Studio
don't like it anymore.

Signed-off-by: Brice Goglin <[email protected]>

Author: ci

contrib/android/AndroidApp/lstopo/src/main/res/layout/about.xml

@@ -23,7 +23,7 @@
             android:layout_width="wrap_content"
             android:layout_height="wrap_content"/>
         <TextView
-            android:id="@+id/open-mpi"
+            android:id="@+id/open_mpi"
             android:layout_width="wrap_content"
             android:layout_height="wrap_content"/>
         <TextView