docs: Some ref fixes

Author: SilverRainZ

docs/conf.rst

@@ -8,13 +8,13 @@ The extension provides the following configuration:
    :type: int
    :default: 10
 
-   The default count of recent revisions. See Functionalities_.
+   The default count of recent revisions. See :doc:`usage`.
 
 .. confval:: recentupdate_template
    :type: str
    :default: see below
 
-   The default Jinja template of update information. See Functionalities_.
+   The default Jinja template of update information. See :doc:`usage`.
 
    Here is the default value:
 
@@ -40,7 +40,7 @@ The extension provides the following configuration:
    :type: str
    :default: "%Y-%m-%dT"
 
-   The default date format of strftime_ filter.
+   The default date format of :ref:`strftime` filter.
 
 .. confval:: recentupdate_exclude_path
    :type: List[str]

docs/index.rst

@@ -30,7 +30,7 @@ Introduction
 
 Get the document update information from git and display it in Sphinx documentation.
 
-This extensions provides a :doc:`recentupdate <usgae>`_ directive, which can show recent document update of current Sphinx documentation. The update information is read from Git_ repository (So you must use Git to manage your documentation). You can customize the update information through generating reStructuredText from Jinja_ template.
+This extensions provides a :doc:`recentupdate <usage>` directive, which can show recent document update of current Sphinx documentation. The update information is read from Git_ repository (So you must use Git to manage your documentation). You can customize the update information through generating reStructuredText from Jinja_ template.
 
 .. _Git: https://git-scm.com/
 .. _Jinja: https://jinja.palletsprojects.com/en/3.0.x/templates/
@@ -69,7 +69,7 @@ Then, add the extension name to ``extensions`` configuration item in your
 
 .. ADDITIONAL CONTENT START
 
-Add ``recentupdate`` directive to your document, Build your document, the directive will be rendered to:
+Add ``recentupdate`` directive to your document, build your document, the directive will be rendered to:
 
 .. example::
    :style: grid

docs/usage.rst

@@ -34,7 +34,7 @@ All available variables_:
 {{ revisions }}
 ---------------
 
-``{{ revisions }}`` is an an array of revisions. The length of array is determined by the argument of`recentupdate <Functionalities>`_ directive.
+``{{ revisions }}`` is an an array of revisions. The length of array is determined by the argument of ``recentupdate`` directive.
 
 Here is the schema of array element:
 
@@ -44,6 +44,8 @@ Here is the schema of array element:
 Filters
 =======
 
+.. _strftime:
+
 strftime
 --------