Bump langchain4j.version from 0.29.1 to 0.31.0 (#1820)

Bumps `langchain4j.version` from 0.29.1 to 0.31.0.

Updates `dev.langchain4j:langchain4j-spring-boot-starter` from 0.29.1 to 0.31.0
- [Release notes](https://github.com/langchain4j/langchain4j-spring/releases)
- [Commits](langchain4j/langchain4j-spring@0.29.1...0.31.0)

Updates `dev.langchain4j:langchain4j-open-ai-spring-boot-starter` from 0.29.1 to 0.31.0
- [Release notes](https://github.com/langchain4j/langchain4j-spring/releases)
- [Commits](langchain4j/langchain4j-spring@0.29.1...0.31.0)

Updates `dev.langchain4j:langchain4j-azure-open-ai` from 0.29.1 to 0.31.0
- [Release notes](https://github.com/langchain4j/langchain4j/releases)
- [Commits](langchain4j/langchain4j@0.29.1...0.31.0)

---
updated-dependencies:
- dependency-name: dev.langchain4j:langchain4j-spring-boot-starter
  dependency-type: direct:production
  update-type: version-update:semver-minor
- dependency-name: dev.langchain4j:langchain4j-open-ai-spring-boot-starter
  dependency-type: direct:production
  update-type: version-update:semver-minor
- dependency-name: dev.langchain4j:langchain4j-azure-open-ai
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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

digiwf-integrations/digiwf-openai-integration/pom.xml

@@ -21,7 +21,7 @@
         <digiwf.spring.cloudstream.utils.version>1.0.0</digiwf.spring.cloudstream.utils.version>
         <httpclient.version>4.5.14</httpclient.version>
         <apache.commons.version>4.4</apache.commons.version>
-        <langchain4j.version>0.29.1</langchain4j.version>
+        <langchain4j.version>0.31.0</langchain4j.version>
     </properties>
 
     <modules>