Bump jackson-databind in /tutorials/appengine-pusher/java (#1590)

Bumps [jackson-databind](https://github.com/FasterXML/jackson) from 2.9.10.5 to 2.9.10.7.
- [Release notes](https://github.com/FasterXML/jackson/releases)
- [Commits](https://github.com/FasterXML/jackson/commits)

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

Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

tutorials/appengine-pusher/java/pom.xml

@@ -39,7 +39,7 @@ Copyright 2017 Google Inc.
     <dependency>
       <groupId>com.fasterxml.jackson.core</groupId>
       <artifactId>jackson-databind</artifactId>
-      <version>2.9.10.5</version>
+      <version>2.9.10.7</version>
     </dependency>
     <dependency>
       <groupId>javax.servlet</groupId>