Document Incomplete substitution rendering of inline `|version|` placeholder in tutorial01.txt

[Vainl]

Section The development server at File: docs/intro/tutorial01.txt

The raw string in the source text:
For more information on production servers see: https://docs.djangoproject.com/en/|version|/howto/deployment/

Compiles into HTML as:
For more information on production servers see: <a class="reference external" href="https://docs.djangoproject.com/en/">https://docs.djangoproject.com/en/</a>6.2/howto/deployment/

The |version| tag breaks the link.

The following change fixes the issue, but it still hardcodes the language to en. There might be a better way to implement this dynamically.

diff --git a/docs/conf.py b/docs/conf.py
index 864b9f7..e32e6f9 100644
--- a/docs/conf.py
+++ b/docs/conf.py
@@ -146,6 +146,7 @@ extlinks = {
     # A file or directory. GitHub redirects from blob to tree if needed.
     "source": ("https://github.com/django/django/blob/main/%s", "%s"),
     "ticket": ("https://code.djangoproject.com/ticket/%s", "#%s"),
+    "djlink": (f"https://djangoproject.com/en/{version}/%s", None),
 }
 
 if sphinx_version < (8, 1):
diff --git a/docs/intro/tutorial01.txt b/docs/intro/tutorial01.txt
index db6150a..643ba44 100644
--- a/docs/intro/tutorial01.txt
+++ b/docs/intro/tutorial01.txt
@@ -131,7 +131,7 @@ You'll see the following output on the command line:
     Quit the server with CONTROL-C.
 
     WARNING: This is a development server. Do not use it in a production setting. Use a production WSGI or ASGI server instead.
-    For more information on production servers see: https://docs.djangoproject.com/en/|version|/howto/deployment/
+    For more information on production servers see: :djlink:`howto/deployment/`
 
 .. note::
     Ignore the warning about unapplied database migrations for now; we'll deal