Bump org.eclipse.jetty:jetty-jspc-maven-plugin

Bumps org.eclipse.jetty:jetty-jspc-maven-plugin from 9.2.14.v20151106 to 11.0.26.

---
updated-dependencies:
- dependency-name: org.eclipse.jetty:jetty-jspc-maven-plugin
  dependency-version: 11.0.26
  dependency-type: direct:production
  update-type: version-update:semver-major
...

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

Author: dependabot[bot]

pom.xml

@@ -37,7 +37,7 @@
                 <groupId>org.eclipse.jetty</groupId>
                 <artifactId>jetty-jspc-maven-plugin</artifactId>
                 <!-- Force the Openfire 4.2.x compatible version of JSP -->
-                <version>9.2.14.v20151106</version>
+                <version>11.0.26</version>
                 <dependencies>
                     <dependency>
                         <groupId>org.igniterealtime.openfire</groupId>