Whitespace change to nudge CI

Author: ndw

xproc/src/main/xml/specification.xml

@@ -15,6 +15,7 @@
 <copyright><year>2018</year><year>2019</year><year>2020</year><year>2021</year><year>2022</year>
 <year>2023</year><year>2024</year><year>2025</year>
 <holder>the Contributors to the XProc 3.1 Specification</holder> 
+
 </copyright>
 
 <bibliomisc role="github-repo">xproc/3.0-specification</bibliomisc>