Upgrade Maven API 3.9.5 -> 3.9.6

See:
- https://maven.apache.org/release-notes-all.html
- https://github.com/apache/maven/releases/tag/maven-3.9.6

pom.xml

@@ -212,7 +212,7 @@
         <version.error-prone-slf4j>0.1.22</version.error-prone-slf4j>
         <version.guava-beta-checker>1.0</version.guava-beta-checker>
         <version.jdk>11</version.jdk>
-        <version.maven>3.9.5</version.maven>
+        <version.maven>3.9.6</version.maven>
         <version.mockito>5.10.0</version.mockito>
         <version.nopen-checker>1.0.1</version.nopen-checker>
         <version.nullaway>0.10.22</version.nullaway>