Explain how to tweet

wiki/src/blueprint/monthly_report.mdwn

@@ -41,6 +41,8 @@ Publishing
 XXX: Move report to news/report_YEAR_MO.mdwn
 XXX: Tweet about the report:
        - "In MONTH we worked on [...] and much more: https://tails.boum.org/news/report_YEAR_MO."
+       - If you don't have access to our Twitter account send you text
+         for the tweet along with your merge request for the report.
 XXX: Send link to tor-reports@lists.torproject.org and tails-project@boum.org
      - To: tails-project@boum.org
      - Cc: tor-reports@lists.torproject.org