Update strings.xml

Author: tibbi

app/src/main/res/values-it/strings.xml

@@ -43,7 +43,7 @@
 
     <!-- Settings -->
     <string name="enable_root_access">Abilita accesso root</string>
-    <string name="press_back_twice">Richiedi di premere Indietro due volte per uscire dall'app</string>
+    <string name="press_back_twice">Richiedi di premere Indietro due volte per uscire dall\'app</string>
 
     <!-- Strings displayed only on Google Playstore. Optional, but good to have -->
     <!-- App title has to have less than 50 characters. If you cannot squeeze it, just remove a part of it -->