Use placeholders in logger.error to prevent string concatenation.

Replaced string concatenation with a placeholder in the logger.error call to improve performance and maintain consistency with logging best practices. This helps avoid unnecessary overhead when logging is disabled.

Author: Konstantin Pavlov

spring-ai-core/src/main/java/org/springframework/ai/converter/BeanOutputConverter.java

@@ -145,7 +145,7 @@ private void generateSchema() {
 			this.jsonSchema = objectWriter.writeValueAsString(jsonNode);
 		}
 		catch (JsonProcessingException e) {
-			logger.error("Could not pretty print json schema for jsonNode: " + jsonNode);
+			logger.error("Could not pretty print json schema for jsonNode: {}", jsonNode);
 			throw new RuntimeException("Could not pretty print json schema for " + this.type, e);
 		}
 	}