Update about.md

Author: Mary Scott

_pages/about.md

@@ -14,6 +14,7 @@ News
 * December 2023: Won Best Presentation Award at the [Warwick Postgraduate Colloquium in Computer Science](https://warwick.ac.uk/fac/sci/dcs/research/wpccs/wpccs23/), "Theory and Foundations" track, WPCCS'23.
 * December 2022: Was Invited Poster Presenter at the [Applied Statistics and Risk Unit Partnership Day](https://warwick.ac.uk/fac/sci/statistics/asru/registration-page-2022n/).
 * October 2022: Was Invited Speaker at [Surrey Centre for Cyber Security, University of Surrey](https://www.surrey.ac.uk/surrey-centre-cyber-security).
+* August 2022: Completed [Summer School on Privacy-Preserving Machine Learning](https://www.conferencemanager.dk/ppmlschool2022/conference), Copenhagen, Denmark.
 * March 2022: Our paper [Applying the Shuffle Model of Differential Privacy to Vector Aggregation](https://arxiv.org/abs/2112.05464) published at BICOD'22.
 * February 2022: Our paper [Aggregation and Transformation of Vector-Valued Messages in the Shuffle Model of Differential Privacy](https://ieeexplore.ieee.org/document/9696239) published at TIFS'22.
 * December 2020: Won Best Long Presentation Award at the [Warwick Postgraduate Colloquium in Computer Science](https://warwick.ac.uk/fac/sci/dcs/research/wpccs/wpccs20/), WPCCS'20.