Update dependency com.microsoft.onnxruntime:onnxruntime to v1.21.0

Author: renovate[bot]

langchain4j-embeddings/pom.xml

@@ -30,7 +30,7 @@
         <dependency>
             <groupId>com.microsoft.onnxruntime</groupId>
             <artifactId>onnxruntime</artifactId>
-            <version>1.20.0</version>
+            <version>1.21.0</version>
         </dependency>
 
         <dependency>