fix license

Signed-off-by: tobiasKaminsky <tobias@kaminsky.me>

app/src/main/res/layout/enforced_servers_spinner.xml

@@ -3,7 +3,7 @@
   ~ Nextcloud - Android Client
   ~
   ~ SPDX-FileCopyrightText: 2006 The Android Open Source Project
-  ~ SPDX-License-Identifier: SPDX-License-Identifier: Apache-2.0
+  ~ SPDX-License-Identifier: Apache-2.0
 -->
 <TextView xmlns:android="http://schemas.android.com/apk/res/android"
     android:id="@android:id/text1"