fix some typos (#5889)

fix some typos in the comments
diff --git a/pulsar-io/jdbc/src/test/java/org/apache/pulsar/io/jdbc/JdbcSinkTest.java b/pulsar-io/jdbc/src/test/java/org/apache/pulsar/io/jdbc/JdbcSinkTest.java
index 84c4406..e48b9bb 100644
--- a/pulsar-io/jdbc/src/test/java/org/apache/pulsar/io/jdbc/JdbcSinkTest.java
+++ b/pulsar-io/jdbc/src/test/java/org/apache/pulsar/io/jdbc/JdbcSinkTest.java
@@ -80,7 +80,7 @@
                         "PRIMARY KEY (field1));"
         );
 
-        // prepare data for udpate sql
+        // prepare data for update sql
         String updateSql = "insert into " + tableName + " values('ValueOfField4', 'ValueOfField4', 4)";
         sqliteUtils.execute(updateSql);