style(rdd-technical-reference.md): integrate feedback

rdd-technical-reference.md

@@ -42,17 +42,17 @@ familiarity with basal technologies such as XML.
 - Implementation of DARIAH-AAI
 - Puppet
 - Docker
-- Exist
+- eXist-db
 - (Lucene-)Indices
 - SADE
 
 ## Repos & Groups
 
-- The departmental group at github: `https://github.com/subugoe/teams/fe`
+- The departmental group at GitHub: `https://github.com/subugoe/teams/fe`
 - The departmental group at GitLab.gwdg.de: `https://gitlab.gwdg.de/fe`
 - The SUB-wide group at GitLab.gwdg.de: `https://gitlab.gwdg.de/subugoe`
 
-<br/>
+\
 
 - DARIAH-wikispace SUB-GWDG-IT
 - (probably further project-related wikispaces)
@@ -67,7 +67,6 @@ familiarity with basal technologies such as XML.
 
 ## Further Reading
 
-- RDD Technical Reference: <https://github.com/subugoe/rdd-technical-reference>
 - DH-FE-Zoterobibliothek
 - Heise, Golem, etc.