Fixing acknowledgement

index.bs

@@ -8,7 +8,6 @@ Editor: Miel Vander Sande, [meemoo - Flemish Institute for Archives](https://mee
 Editor: Patrick Hochstenbach, [IDLab - Ghent University](https://knows.idlab.ugent.be), [email protected]
 Editor: Ruben Dedecker, [IDLab - Ghent University](https://knows.idlab.ugent.be), [email protected]
 Editor: Jeroen Werbrouck, [IDLab - Ghent University](https://knows.idlab.ugent.be), [email protected]
-Editor: Herbert Van de Sompel, [DANS + Ghent University](https://dans.knaw.nl/nl/), [email protected]
 Abstract: This document specifies the requirements for implementing and hosting an Artefact Lifecycle Event Log.
 Markup Shorthands: markdown yes
 </pre>
@@ -585,4 +584,9 @@ Spec roadmap {#roadmap}
 		"publisher": "ResearcherPod project"
 	}
 }
-</pre>
+</pre>
+
+# Acknowledgement
+
+We thank Herbert Van de Sompel, [DANS + Ghent University](https://dans.knaw.nl/nl/), [email protected]
+for the valuable input during this project.