Bump jetty-webapp in /handlebars-proto

Bumps [jetty-webapp](https://github.com/eclipse/jetty.project) from 9.4.43.v20210629 to 9.4.44.v20210927.
- [Release notes](https://github.com/eclipse/jetty.project/releases)
- [Commits](jetty/jetty.project@jetty-9.4.43.v20210629...jetty-9.4.44.v20210927)

---
updated-dependencies:
- dependency-name: org.eclipse.jetty:jetty-webapp
  dependency-type: direct:production
...

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

Author: dependabot[bot]

handlebars-proto/pom.xml

@@ -14,7 +14,7 @@
   <name>A standalone Handlebars Server</name>
 
   <properties>
-    <jetty-version>9.4.43.v20210629</jetty-version>
+    <jetty-version>9.4.44.v20210927</jetty-version>
   </properties>
 
   <build>