Update comments and rename param

src/main/java/com/snowflake/snowpark_java/Functions.java

@@ -377,11 +377,11 @@ public static Column sum(Column col) {
    * sum of unique non-null values. If all records inside a group are NULL, the function returns
    * NULL.
    *
-   * @since 0.9.0
-   * @param str The input string
+   * @since 1.12.0
+   * @param colName The input column name
    * @return The result column
    */
-  public static Column sum(String str) { return sum(col(str)); }
+  public static Column sum(String colName) { return sum(col(colName)); }
 
   /**
    * Returns the sum of non-NULL distinct records in a group. You can use the DISTINCT keyword to

src/main/scala/com/snowflake/snowpark/functions.scala

@@ -348,8 +348,7 @@ object functions {
   def stddev_pop(e: Column): Column = builtin("stddev_pop")(e)
 
   /**
-   * Returns the sum of non-NULL records in a group. You can use the DISTINCT keyword to compute
-   * the sum of unique non-null values. If all records inside a group are NULL,
+   * Returns the sum of non-NULL records in a group. If all records inside a group are NULL,
    * the function returns NULL.
    *
    * @group agg_func
@@ -358,16 +357,15 @@ object functions {
   def sum(e: Column): Column = builtin("sum")(e)
 
   /**
-   * Returns the sum of non-NULL records in a group. You can use the DISTINCT keyword to compute
-   * the sum of unique non-null values. If all records inside a group are NULL,
+   * Returns the sum of non-NULL records in a group. If all records inside a group are NULL,
    * the function returns NULL.
    *
    * @group agg_func
-   * @since 0.1.0
-   * @param e The input string
+   * @since 12.1.0
+   * @param colName The input column name
    * @return The result column
    */
-  def sum(e: String): Column = sum(col(e))
+  def sum(colName: String): Column = sum(col(colName))
 
   /**
    * Returns the sum of non-NULL distinct records in a group. You can use the DISTINCT keyword to