fix error description of sample not support fill

src/client/src/tscSQLParser.c

@@ -5478,7 +5478,7 @@ int32_t validateFillNode(SSqlCmd* pCmd, SQueryInfo* pQueryInfo, SSqlNode* pSqlNo
 
   const char* msg1 = "value is expected";
   const char* msg2 = "invalid fill option";
-  const char* msg3 = "top/bottom not support fill";
+  const char* msg3 = "top/bottom/sample not support fill";
   const char* msg4 = "illegal value or data overflow";
   const char* msg5 = "fill only available for interval query";
   const char* msg6 = "not supported function now";