Forgot to fix 2 headers.

de_help.md

@@ -12,7 +12,7 @@ Für spezifische Informationen zu JLU GitLab, siehe [Informationen]({{ '/informa
 ## Inhalt {#toc}
 
 <!-- NOTE dies ist (derzeit) nur eine manuell verwaltete Liste. -->
-- [Notwendige Begriffe](#essential_terms)
+- [Wichtige Konzepte](#essential_terms)
     - [Git Begriffe](#terms_git)
     - [GitLab Begriffe](#terms_gitlab)
 - [Wie benutzt man GitLab?](#how_to_gitlab)

en_help.md

@@ -33,7 +33,7 @@ For specific information about JLU GitLab, see [information]({{ '/information/#w
 - [Further help](#more_help)
 
 
-## Essential terms {#essential_terms}
+## Important concepts {#essential_terms}
 
 Git and GitLab are versatile tools with many technical concepts and terms.
 Because their development and terminology is created in English, these terms have been only partially translated into other languages.