Re-add strings that got lost during merge. (#3094)

Corona-Warn-App/src/main/res/values/strings.xml

@@ -2008,6 +2008,13 @@
     <!-- XBUT: Trace location check-ins invalid qr code dialog negative button -->
     <string name="trace_location_attendee_invalid_qr_code_dialog_negative_button">"Cancel"</string>
 
+    <!-- XHED: Title for Vaccination Certificate Registration Home Card -->
+    <string name="vaccination_card_registration_title">"Impfzertifikat registrieren"</string>
+    <!-- YTXT: Body text for Vaccination Certificate Registration Home Card -->
+    <string name="vaccination_card_registration_body">"Scannen Sie den QR-Code auf Ihrem Impfzertifikat, um Ihre Impfung zu registrieren und einen digitalen Impfnachweis zu erhalten."</string>
+    <!-- XBUT: button for Vaccination Certificate Registration Home Card -->
+    <string name="vaccination_card_register">"Registrieren"</string>
+
     <!-- ####################################
         Incompatibility warning card
     ###################################### -->