Update ElevationTIN.xsd to make endlifespanVersion optional (#54)

* Update ElevationTIN.xsd to make endlifespanVersion optional

Added minOccurs=0 to the endLifespanVersion definition - related issue #42

* Add changelog and version

Add a comment with changelog and update the version

* Update version

Co-authored-by: Fabio Vinci <f.vinci@epsilon-italia.it>

schemas/el-tin/4.0/ElevationTin.xsd

@@ -1,4 +1,7 @@
-<?xml version="1.0" encoding="UTF-8"?><schema xmlns="http://www.w3.org/2001/XMLSchema" xmlns:base="http://inspire.ec.europa.eu/schemas/base/3.3" xmlns:el-bas="http://inspire.ec.europa.eu/schemas/el-bas/4.0" xmlns:el-tin="http://inspire.ec.europa.eu/schemas/el-tin/4.0" xmlns:gml="http://www.opengis.net/gml/3.2" elementFormDefault="qualified" targetNamespace="http://inspire.ec.europa.eu/schemas/el-tin/4.0" version="4.0">
+<?xml version="1.0" encoding="UTF-8"?><schema xmlns="http://www.w3.org/2001/XMLSchema" xmlns:base="http://inspire.ec.europa.eu/schemas/base/3.3" xmlns:el-bas="http://inspire.ec.europa.eu/schemas/el-bas/4.0" xmlns:el-tin="http://inspire.ec.europa.eu/schemas/el-tin/4.0" xmlns:gml="http://www.opengis.net/gml/3.2" elementFormDefault="qualified" targetNamespace="http://inspire.ec.europa.eu/schemas/el-tin/4.0" version="4.0.1">
+  <!-- v4.0.1 of this schema released in INSPIRE schema release v.2022.2.
+       Change performed: Set ‘endLifespanVersion’ multiplicity to [0..1] - non-breaking change - bugfix
+       See https://github.com/INSPIRE-MIF/application-schemas/releases/tag/2022.2 -->
   <annotation>
     <documentation>-- Name --
 elevation - tin
@@ -47,7 +50,7 @@ Date and time at which this version of the spatial object was inserted or change
               </simpleContent>
             </complexType>
           </element>
-          <element name="endLifespanVersion" nillable="true">
+          <element minOccurs="0" name="endLifespanVersion" nillable="true">
             <annotation>
               <documentation>-- Name --
 end lifespan version