Update dependency com.github.librepdf:openrtf to v2

Author: renovate[bot]

pom.xml

@@ -77,7 +77,7 @@
     <junit.version>5.14.2</junit.version>
     <log4j.version>2.25.3</log4j.version>
     <mockito.version>4.11.0</mockito.version>
-    <openrtf.version>1.2.1</openrtf.version>
+    <openrtf.version>2.0.0</openrtf.version>
     <owasp-java-html-sanitizer.version>20220608.1</owasp-java-html-sanitizer.version>
     <servlet-api.version>3.1.0</servlet-api.version>
     <struts2.version>6.8.0</struts2.version>