Add information about GEANT Symposium LT (#77)

* Added information about GEANT Symposium LT

* Fixed link

docs/nmaas-presentations.md

@@ -407,4 +407,20 @@ Presentations given as part of the GÉANT GN5-1 project.
 
 **YouTube:** [https://www.youtube.com/watch?v=xx1NxqYTIpA](https://www.youtube.com/watch?v=xx1NxqYTIpA)
 
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+### GÉANT Project Symposium 2023
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+**Event Type:** Presentations / Lightning talks
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+**Presenter(s):** Vojdan Kjorveziroski
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+**Event:** GÉANT Project Symposium 2023
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+**Date:** 12-14 December 2023
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+**Location:** Montpellier, France
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+**Slides:** [https://box.psnc.pl/f/e3bdc8d26a](https://box.psnc.pl/f/e3bdc8d26a/?raw=1)
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