Update dependency net.sf.saxon:Saxon-HE from v11.6 to v12

Author: renovate[bot]

pom.xml

@@ -56,7 +56,7 @@
 
         <netex-java-model.version>2.0.15</netex-java-model.version>
         <netex-parser-java.version>3.1.29</netex-parser-java.version>
-        <saxon.version>11.6</saxon.version>
+        <saxon.version>12.5</saxon.version>
         <geotools.version>32.1</geotools.version>
         <snakeyaml.version>2.3</snakeyaml.version>
         <slf4j.version>2.0.16</slf4j.version>