Correct double dates in posts

...erview-and-logs-for-the-dev-meeting-held-on-2016-03-05.md

...9-16-logs-for-the-Community-meeting-held-on-2017-09-16.md

...erview-and-logs-for-the-dev-meeting-held-on-2017-09-17.md

...9-24-logs-for-the-Kovri-dev-meeting-held-on-2017-09-24.md

...9-30-logs-for-the-Community-meeting-held-on-2017-09-30.md

...erview-and-logs-for-the-dev-meeting-held-on-2017-10-01.md

...0-06-logs-for-the-Kovri-dev-meeting-held-on-2017-10-06.md

...0-14-logs-for-the-Community-meeting-held-on-2017-10-14.md

...erview-and-logs-for-the-dev-meeting-held-on-2017-10-22.md

...0-28-logs-for-the-Community-meeting-held-on-2017-10-28.md

...for-the-Monero-Research-Lab-meeting-held-on-2017-10-30.md