Bump openjpa in /openejb/examples/polling-parent/polling-domain

Bumps openjpa from 2.2.0 to 2.2.2.

---
updated-dependencies:
- dependency-name: org.apache.openjpa:openjpa
  dependency-type: direct:production
...

Signed-off-by: dependabot[bot] <support@github.com>
diff --git a/openejb/examples/polling-parent/polling-domain/pom.xml b/openejb/examples/polling-parent/polling-domain/pom.xml
index 9c2ab19..087f25b 100644
--- a/openejb/examples/polling-parent/polling-domain/pom.xml
+++ b/openejb/examples/polling-parent/polling-domain/pom.xml
@@ -60,7 +60,7 @@
           <dependency>
             <groupId>org.apache.openjpa</groupId>
             <artifactId>openjpa</artifactId>
-            <version>2.2.0</version>
+            <version>2.2.2</version>
           </dependency>
         </dependencies>
       </plugin>