gnu: python-xdg: Deprecate in favor of python-xdg-base-dirs.

The upstream package name has been changed since version 6.

* gnu/packages/python-xyz.scm (python-xdg-base-dirs):
  Rename from python-xdg.
  (python-xdg): Deprecate in favor of python-xdg-base-dirs.
* gnu/packages/cinnamon.scm (python3-xapp)[propagated-inputs]:
  Replace python-xdg with python-xdg-base-dirs.
* gnu/packages/speech.scm (speech-dispatcher)[inputs]:
  Replace python-xdg with python-xdg-base-dirs.

References: https://github.com/srstevenson/xdg-base-dirs/pull/141
Change-Id: Ie81d0010d4c08147cf7fd1698fb11876f8b233b3
Signed-off-by: Liliana Marie Prikler <liliana.prikler@gmail.com>

gnu/packages/cinnamon.scm

@@ -159,7 +159,7 @@ cross-DE solutions.")
            python-setproctitle
            python-setuptools
            python-unidecode
-           python-xdg
+           python-xdg-base-dirs
            python-xlib))
     (home-page "https://github.com/linuxmint/python3-xapp")
     (synopsis "Python 3 XApp library")

gnu/packages/python-xyz.scm

@@ -40794,13 +40794,13 @@ and directories in the file system.  They are stored as name:data pairs
 associated with file system objects (files, directories, symlinks, etc).")
     (license license:expat)))
 
-(define-public python-xdg
+(define-public python-xdg-base-dirs
   (package
-    (name "python-xdg")
+    (name "python-xdg-base-dirs")
     (version "6.0.0")
     (source (origin
               (method url-fetch)
-              (uri (pypi-uri "xdg" version))
+              (uri (pypi-uri "xdg-base-dirs" version))
               (sha256
                (base32
                 "14hwk9j5zjc8rvirw95mrb07zdnpjaxjx2mj3rnq8pnlyaa809r4"))))
@@ -40817,6 +40817,10 @@ Python utility you write that deals with user cache, configuration, or data
 files.")
     (license license:isc)))
 
+;; XXX: Deprecated on <2026-02-19>.
+(define-deprecated-package python-xdg
+  python-xdg-base-dirs)
+
 (define-public python-xlib
   (package
     (name "python-xlib")

gnu/packages/speech.scm

@@ -296,7 +296,7 @@ efficiency through the use of a compact vector representation of n-grams.")
            pipewire
            pulseaudio
            python
-           python-xdg))
+           python-xdg-base-dirs))
     (synopsis "Common interface to speech synthesizers")
     (description "The Speech Dispatcher project provides a high-level
 device independent layer for access to speech synthesis through a simple,