fix fastjson版本漏洞

pom.xml

@@ -36,7 +36,7 @@
         <hutool.version>5.3.3</hutool.version>
         <httpclient.version>4.5.12</httpclient.version>
         <lombok.version>1.18.2</lombok.version>
-        <fastjson.version>1.2.51</fastjson.version>
+        <fastjson.version>1.2.75</fastjson.version>
         <lang3.version>3.7</lang3.version>
         <knife4j.version>2.0.2</knife4j.version>
         <mysql.version>8.0.15</mysql.version>