Update strings.xml

Signed-off-by: rakekniven <2069590+rakekniven@users.noreply.github.com>

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

@@ -185,7 +185,7 @@ How to translate with transifex:
     <string name="nc_profile_personal_info_title">Personal Info</string>
 
     <string name="nc_settings_diagnose_title">Diagnosis</string>
-    <string name="nc_settings_diagnose_subtitle">Open Diagnosis screen to check settings or create bug report</string>
+    <string name="nc_settings_diagnose_subtitle">Open diagnosis screen to check settings or create bug report</string>
 
     <string name="nc_settings_notifications_granted">Notifications are granted</string>
     <string name="nc_settings_notifications_declined">Notifications are declined</string>