Bump ai.djl:api from 0.28.0 to 0.31.1

Bumps [ai.djl:api](https://github.com/deepjavalibrary/djl) from 0.28.0 to 0.31.1.
- [Release notes](https://github.com/deepjavalibrary/djl/releases)
- [Commits](deepjavalibrary/djl@v0.28.0...v0.31.1)

---
updated-dependencies:
- dependency-name: ai.djl:api
  dependency-type: direct:production
...

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

Author: dependabot[bot]

pom.xml

@@ -513,7 +513,7 @@
     <dependency>
       <groupId>ai.djl</groupId>
       <artifactId>api</artifactId>
-      <version>0.28.0</version>
+      <version>0.31.1</version>
       <exclusions>
         <exclusion>
           <groupId>com.google.code.gson</groupId>