Update 5-bsl.md

Author: rofe

hackathons/5-bsl.md

@@ -221,6 +221,7 @@ For occasional contributors to Helix it can get hard to keep track of what has c
 
 ### Demos
 You can watch the entire recording [here](https://bluejeans.com/s/elM6g/).
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 1. Server timing & DOM based HTL engine (@tripodsan)
 2. Helix Pages & auto-generated sequence diagrams (@ktpdobe)
 3. Performance analysis of Helix OpenWhisk actions (@dunguyen)