[mobile-broadband-provider-info] pl/nju mobile: Fix the balance check USSD code

[Thomas Haller <thaller src gnome org>]

commit a8c2b861fa82f09200868b1c2500e9c6ec24263a
Author: Sebastian Krzyszkowiak <dos dosowisko net>
Date:   Tue Oct 20 00:45:56 2020 +0000

    pl/nju mobile: Fix the balance check USSD code
    
    https://gitlab.gnome.org/GNOME/mobile-broadband-provider-info/-/merge_requests/21

 serviceproviders.xml | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
---
diff --git a/serviceproviders.xml b/serviceproviders.xml
index a4da0c2..9208688 100644
--- a/serviceproviders.xml
+++ b/serviceproviders.xml
@@ -10777,7 +10777,7 @@ conceived.
                        <network-id mcc="260" mnc="03"/>
                        <voicemail>*501</voicemail>
                        <balance-check>
-                               <ussd>*127*1*#</ussd>
+                               <ussd>*127*1#</ussd>
                        </balance-check>
                        <balance-top-up>
                                <ussd replacement="CODE">*128*CODE#</ussd>