fix: upgrade com.alibaba:fastjson from 1.2.47 to 1.2.68 (#2253)

Snyk has created this PR to upgrade com.alibaba:fastjson from 1.2.47 to 1.2.68.

See this package in NPM:
https://www.npmjs.com/package/com.alibaba:fastjson

See this project in Snyk:
https://app.snyk.io/org/cxie/project/2f701ce6-b421-4bbf-aaad-9d2bdb8569e4?utm_source=github&utm_medium=upgrade-pr

tests/milvus-java-test/pom.xml

@@ -97,7 +97,7 @@
         <dependency>
             <groupId>com.alibaba</groupId>
             <artifactId>fastjson</artifactId>
-            <version>1.2.47</version>
+            <version>1.2.68</version>
         </dependency>