Update _index.md: new environmental sensors workshop location and time

en/workshops/_index.md

@@ -16,8 +16,11 @@ title: Workshops
 please keep chronological order
 
 ### Environmental and IMU sensor workshop
- * Time: Day 2, 19:00
- * Location: card10 village
+> ~~ * Time: Day 2, 19:00 ~~
+> ~~ * Location: card10 village ~~
+  * Time: Day2, **20:00**
+  * Location: Johnson
+  * [Description](https://events.ccc.de/camp/2019/wiki/Session:Environmental_and_IMU_sensors_on_the_card10_badge)
 
 
 ### Rust l0dables on the card10 badge