update index.adoc with version info and date (#492)

* update index.adoc with version info and date

* fix referenced security document version

---------

Co-authored-by: sebbader-sap <107036549+sebbader-sap@users.noreply.github.com>

Author: BirgitBoss

documentation/IDTA-01002-3/modules/ROOT/pages/index.adoc

@@ -8,20 +8,22 @@ This specification is part of the https://industrialdigitaltwin.org/en/content-h
 
 == Version
 
-This is version 3.1 of the specification IDTA-01002.
+This is version 3.1.1 of the specification IDTA-01002.
 
-Previous version: 3.0.3
+Previous version: 3.1
 
 [#metamodel-versions]
 == Metamodel Versions
 
-This document (version 3.1) uses the following parts of the “Specification of the Asset Administration Shell” series:
+This document uses the following parts of the “Specification of the Asset Administration Shell” series:
 
 * IDTA-01001 Part 1: Metamodel in version 3.1 xref:bibliography.adoc#bib1[[1\]]
 * IDTA-01003-a Part 3a: Data Specification – IEC 61360 in version 3.1 xref:bibliography.adoc#bib2[[2\]]
-* IDTA-01004 Part 4: Security in version 3.1 xref:bibliography.adoc#bib3[[3\]]
+* IDTA-01004 Part 4: Security in version 3.0 xref:bibliography.adoc#bib3[[3\]]
 * IDTA-01005 Part 5: Package File Format (AASX) in version 3.1 xref:bibliography.adoc#bib4[[4\]]
 
+If there are bugfixes of the parts, these shall be used.
+
 == Notice
 
 Copyright: Industrial Digital Twin Association e.V. (IDTA)
@@ -35,7 +37,7 @@ https://creativecommons.org/licenses/by/4.0/[Creative Commons Attribution 4.0 In
 
 SPDX-License-Identifier: CC-BY-4.0
 
-May 2025
+July 2025
 
 == How to Get in Contact