Document generators_folder (#4147)

Author: AbrilRBS

reference/conanfile/attributes/folders.inc

@@ -42,6 +42,15 @@ The folder used to build the source code. The path is built joining the base dir
 directory when running in the cache or the ``output folder`` when running locally) with
 the value of ``folders.build`` if declared in the ``layout()`` method.
 
+
+.. _attribute_generators_folder:
+
+generators_folder
+-----------------
+
+The folder where the files in the ``generate()`` method should be generated. The path is built
+from the layout's ``self.folders.generators`` attribute.
+
 .. _conan_conanfile_properties_package_folder:
 
 package_folder

reference/conanfile/methods/generate.rst

@@ -24,7 +24,7 @@ The idea is that the ``generate()`` method implements all the necessary logic, m
 very straightforward, and also the ``build()`` method logic simpler. The build produced by a user in their local flow should result in
 exactly the same one as the build done in the cache with a ``conan create`` without effort.
 
-Generation of files happens in the ``generators_folder`` as defined by the current layout.
+Generation of files happens in the :ref:`generators_folder<attribute_generators_folder>` as defined by the current layout.
 
 In many cases, the ``generate()`` method might not be necessary, and declaring the ``generators`` attribute could be enough: