Clarify class keyword usage (#7741)

* Clarify class keyword usage

* Added reference link for class_name as well

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Co-authored-by: A Thousand Ships <[email protected]>

tutorials/scripting/gdscript/gdscript_basics.rst

@@ -173,9 +173,9 @@ in case you want to take a look under the hood.
 +------------+---------------------------------------------------------------------------------------------------------------------------------------------------+
 | return     | Returns a value from a function.                                                                                                                  |
 +------------+---------------------------------------------------------------------------------------------------------------------------------------------------+
-| class      | Defines a class.                                                                                                                                  |
+| class      | Defines an inner class. See `Inner classes`_.                                                                                                     |
 +------------+---------------------------------------------------------------------------------------------------------------------------------------------------+
-| class_name | Defines the script as a globally accessible class with the specified name.                                                                        |
+| class_name | Defines the script as a globally accessible class with the specified name. See `Registering named classes`_.                                      |
 +------------+---------------------------------------------------------------------------------------------------------------------------------------------------+
 | extends    | Defines what class to extend with the current class.                                                                                              |
 +------------+---------------------------------------------------------------------------------------------------------------------------------------------------+