Resolve "Add education milestones to the roadmap"

Closes #104 (closed)

_roadmap/software/2021-02-26-tasks.md

+---
+date: 2021-02-26
+title: Tasks in February 2021
+service: software
+---
+
+## Publish training program for the first half of 2021 
+The education and training work package publishes the offered training events for the first half of 2021 on <https://software.hifis.net/events>.