Remove unnecessary header from NOTES.txt file

This commit removes the header that was previously included at the
beginning of the NOTES.txt file in the Paperless-NGX chart. The
header line, which referenced a common library for rendering, was
not needed for the proper function of the NOTES.txt file and
cluttered the installation message.

The main content of the file now directly congratulates users on
the successful installation of the Paperless-NGX chart and
provides instructions for accessing the application. No
functional changes to the application were introduced, and there
are no breaking changes associated with this update.

charts/paperless-ngx/templates/NOTES.txt

@@ -1,6 +1,3 @@
-{{- /* Dieser Header funktioniert in den meisten Fällen, da er in der lib existiert */}}
-{{- include "bjw-s.common.lib.chart.header" . }}
-
 Herzlichen Glückwunsch! Die Installation Ihres Paperless-NGX-Charts war erfolgreich.
 
 Um auf die Anwendung zuzugreifen, prüfen Sie bitte die Details des 'main' Service.