Fix typo

Author: poikilotherm

presentations.md

@@ -123,7 +123,7 @@
   - [DataCite Webinar "DOIs for Research Software"](https://datacite.zoom.us/webinar/register/1016832862277/WN_-K-zNcRIQOmxU3y1v-nEpQ#/registration)
   - [PDF](https://doi.org/10.5281/zenodo.7963967)
   - [Youtube](https://youtu.be/LaUdaQ-lI1E?t=2991)
-* 2023-06-06
+* - 2023-06-06
   - RSR
   - [Dataverse Community Meeting 2023](https://projects.iq.harvard.edu/dcm2023)
   - [Poster](https://doi.org/10.5281/zenodo.7986936)