Add a patch for timestamps_in_manpages_generated_by_rst2man toolchain issue.

issues.yml

@@ -528,6 +528,7 @@ timestamps_in_manpages_generated_by_help2man:
 timestamps_in_manpages_generated_by_rst2man:
   description: |
     Manpages generated with rst2man embed the date
+  url: https://bugs.debian.org/831779
 fonts_in_pdf_files:
   description: |
     The internally used names/identifiers of fonts embedded into PDF files varies.