Bump xslthl from 2.0.1 to 2.1.3 (#5463)

Bumps xslthl from 2.0.1 to 2.1.3.

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jetty-documentation/pom.xml

@@ -130,7 +130,7 @@
           <dependency>
             <groupId>net.sf.xslthl</groupId>
             <artifactId>xslthl</artifactId>
-            <version>2.0.1</version>
+            <version>2.1.3</version>
             <scope>runtime</scope>
           </dependency>
           <dependency>