Bump jetty-webapp from 9.4.28.v20200408 to 9.4.34.v20201102 in /embedded

Bumps [jetty-webapp](https://github.com/eclipse/jetty.project) from 9.4.28.v20200408 to 9.4.34.v20201102.
- [Release notes](https://github.com/eclipse/jetty.project/releases)
- [Commits](https://github.com/eclipse/jetty.project/compare/jetty-9.4.28.v20200408...jetty-9.4.34.v20201102)

Signed-off-by: dependabot[bot] <support@github.com>

embedded/pom.xml

@@ -58,7 +58,7 @@
     <dependency>
       <groupId>org.eclipse.jetty</groupId>
       <artifactId>jetty-webapp</artifactId>
-      <version>9.4.28.v20200408</version>
+      <version>9.4.34.v20201102</version>
     </dependency>
     <dependency>
       <groupId>org.eclipse.jetty</groupId>