Typo: form -> from

## What changes were proposed in this pull request?

Minor typo fix

## How was this patch tested?

Existing unit tests on Jenkins

Author: Andrew Ash <andrew@andrewash.com>

Closes #15486 from ash211/patch-8.

sql/core/src/main/scala/org/apache/spark/sql/DataFrameReader.scala

@@ -363,7 +363,7 @@ class DataFrameReader private[sql](sparkSession: SparkSession) extends Logging {
    * type.</li>
    * <li>`quote` (default `"`): sets the single character used for escaping quoted values where
    * the separator can be part of the value. If you would like to turn off quotations, you need to
-   * set not `null` but an empty string. This behaviour is different form
+   * set not `null` but an empty string. This behaviour is different from
    * `com.databricks.spark.csv`.</li>
    * <li>`escape` (default `\`): sets the single character used for escaping quotes inside
    * an already quoted value.</li>