add version number of DSFinV-K specification

doc/appendix-de-kassensichv/procedural-documentation/dsfinv-k-generation.md

@@ -5,7 +5,7 @@
 
 You can download the current version of the DSFinV-K specification [here](https://www.bzst.de/DE/Unternehmen/Aussenpruefungen/DigitaleSchnittstelleFinV/digitaleschnittstellefinv_node.html).
 
-Based on the the current version of the DSFinV-K specification, this chapter explains how the DSFinV-K export is structured, shows how the previously described input values are mapped by fisklatrust to the files and data of the DSFinV-K export and defines how additional, for the DSFInV-K required, values can be sent to the ft.Middleware. Furthermore, it describes how the marking of actions (DE: Vorgänge) can be made by connecting business actions (DE: Geschäftsvorfälle) and other procedures, occurrences and events (DE: Andere Vorgänge). 
+Based on the the version 2.1 of the DSFinV-K specification, this chapter explains how the DSFinV-K export is structured, shows how the previously described input values are mapped by fisklatrust to the files and data of the DSFinV-K export and defines how additional, for the DSFInV-K required, values can be sent to the ft.Middleware. Furthermore, it describes how the marking of actions (DE: Vorgänge) can be made by connecting business actions (DE: Geschäftsvorfälle) and other procedures, occurrences and events (DE: Andere Vorgänge). 
 
 #### Structure