chore(docs): #618: adapt formatting

docs/concept/#438-investigation-dDTR-api-endpoints/#438-investigation-dDTR-api-endpoints.md

@@ -73,10 +73,11 @@ No impact on data consumers.
 
 ![AAS_Access_v3_Architecture.svg](AAS_Access_v3_Architecture.svg)
 
-<small>This diagram was created with <a href="http://www.inkscape.org/" target="_blank" alt="Inkscape">Inkscape</a> from
+<sup><sub>*This diagram was created with <a href="http://www.inkscape.org/" target="_blank" alt="Inkscape">Inkscape</a>
+from
 the original JPG from
 [#438: Investigation and impact determination on new dDTR API endpoints for access management](https://github.com/eclipse-tractusx/item-relationship-service/issues/438)
-in order to fulfill [TRG 1.04](https://eclipse-tractusx.github.io/docs/release/trg-1/trg-1-4).</small>
+in order to fulfill [TRG 1.04](https://eclipse-tractusx.github.io/docs/release/trg-1/trg-1-4).*</sub></sup>
 
 ## Glossary