Bump jackson-databind in /apigen/src/test/projects/posts

Bumps [jackson-databind](https://github.com/FasterXML/jackson) from 2.12.6.1 to 2.12.7.1.
- [Release notes](https://github.com/FasterXML/jackson/releases)
- [Commits](https://github.com/FasterXML/jackson/commits)

---
updated-dependencies:
- dependency-name: com.fasterxml.jackson.core:jackson-databind
  dependency-type: direct:development
...

Signed-off-by: dependabot[bot] <[email protected]>

Author: dependabot[bot]

apigen/src/test/projects/posts/pom.xml

@@ -77,7 +77,7 @@
     <dependency>
       <groupId>com.fasterxml.jackson.core</groupId>
       <artifactId>jackson-databind</artifactId>
-      <version>2.12.6.1</version>
+      <version>2.12.7.1</version>
       <scope>test</scope>
     </dependency>
     <dependency>