about.md: Link to Eiffel and mention tag events

Solves: Jira GER-2365
Change-Id: If8f145f04858b5d7fa023035c171f23c2fae95c7
1 file changed
tree: 568b32a4dcad5ff7ad4e44d6a822fff1fde9a3be
  1. src/
  2. BUILD
  3. external_plugin_deps.bzl