Bug 563630 - Update to Jetty 9.4.29

Build jsps with respective jsp compiler.

Change-Id: Iece8cc8b60eeb7d20a3a559c0c25a2af577dd264
Signed-off-by: Alexander Kurtakov <akurtako@redhat.com>

org.eclipse.help.webapp/pom.xml

diff --git a/org.eclipse.help.webapp/pom.xml b/org.eclipse.help.webapp/pom.xml
index 169d182..5aefac4 100644
--- a/org.eclipse.help.webapp/pom.xml
+++ b/org.eclipse.help.webapp/pom.xml
@@ -25,7 +25,7 @@
       <plugin>
         <groupId>org.eclipse.jetty</groupId>
         <artifactId>jetty-jspc-maven-plugin</artifactId>
-        <version>9.4.28.v20200408</version>
+        <version>9.4.29.v20200521</version>
         <executions>
           <execution>
             <id>jspc</id>