avoid API change

Author: yaooqinn

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

@@ -894,6 +894,17 @@ object SparkSession extends Logging {
      *
      * @since 2.2.0
      */
+    def withExtensions(f: SparkSessionExtensions => Unit): Builder = synchronized {
+      f(extensions)
+      this
+    }
+
+    /**
+     * Inject extensions into the [[SparkSession]]. This allows a user to add Analyzer rules,
+     * Optimizer rules, Planning Strategies or a customized parser.
+     *
+     * @since 3.2.0
+     */
     def withExtensions(f: SparkSessionExtensionsProvider): Builder = synchronized {
       f(extensions)
       this