fix(deps): update dependency dev.langchain4j:langchain4j-bom to v1.9.1 (#247)

Co-authored-by: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com>

Author: renovate[bot]

gradle/libs.versions.toml

@@ -45,7 +45,7 @@ gson = "2.12.0"
 jinjava = "2.8.1"
 
 # Managed versions appear in the BOM
-managed-langchain4j = "1.8.0"
+managed-langchain4j = "1.9.1"
 managed-langchain4j-community = "1.8.0-beta15"
 testcontainers-redis = "2.2.4"
 astra-db-client = "1.2.7"