Regenerate classroom client (#7793)

Generated in GitHub action: https://togithub.com/googleapis/googleapis/google-api-php-client-services/actions/workflows/codegen.yaml

Author: yoshi-code-bot

src/Classroom/Course.php

@@ -170,6 +170,12 @@ class Course extends \Google\Collection
    * @var string
    */
   public $section;
+  /**
+   * Optional. The subject of the course.
+   *
+   * @var string
+   */
+  public $subject;
   protected $teacherFolderType = DriveFolder::class;
   protected $teacherFolderDataType = '';
   /**
@@ -479,6 +485,22 @@ public function getSection()
   {
     return $this->section;
   }
+  /**
+   * Optional. The subject of the course.
+   *
+   * @param string $subject
+   */
+  public function setSubject($subject)
+  {
+    $this->subject = $subject;
+  }
+  /**
+   * @return string
+   */
+  public function getSubject()
+  {
+    return $this->subject;
+  }
   /**
    * Information about a Drive Folder that is shared with all teachers of the
    * course. This field will only be set for teachers of the course and domain