Add config.cache to the list of warning types

doc/usage/configuration.rst

@@ -345,7 +345,7 @@ General configuration
    * ``app.add_role``
    * ``app.add_generic_role``
    * ``app.add_source_parser``
-   * ``autosectionlabel.*``
+   * ``config.cache``
    * ``download.not_readable``
    * ``epub.unknown_project_files``
    * ``epub.duplicated_toc_entry``
@@ -367,7 +367,14 @@ General configuration
    * ``toc.not_readable``
    * ``toc.secnum``
 
-   Then extensions can also define their own warning types.
+   Extensions can also define their own warning types.
+   Those defined by the first-party ``sphinx.ext`` extensions are:
+
+   * ``autodoc``
+   * ``autodoc.import_object``
+   * ``autosectionlabel.<document name>``
+   * ``autosummary``
+   * ``intersphinx.external``
 
    You can choose from these types.  You can also give only the first
    component to exclude all warnings attached to it.
@@ -388,7 +395,7 @@ General configuration
 
    .. versionchanged:: 2.1
 
-      Added ``autosectionlabel.*``
+      Added ``autosectionlabel.<document name>``
 
    .. versionchanged:: 3.3.0
 
@@ -402,9 +409,13 @@ General configuration
 
       Added ``i18n.inconsistent_references``
 
-    .. versionadded:: 7.1
+   .. versionadded:: 7.1
+
+      Added ``index`` warning type.
+
+   .. versionadded:: 7.3
 
-        Added ``index`` warning type.
+      Added ``config.cache`` warning type.
 
 .. confval:: needs_sphinx