Fix external links

Author: veit

docs/conf.py

@@ -139,7 +139,8 @@
     r"https://www.jstor.org/",
     # Broken on GitHub
     r"https://chartability.fizz.studio",
-    r"https://www.freiburg.de/pb/site/Freiburg/get/params_E1885022337/1401046/Leitfaden%20barrierefreie%20Kommunikation_ckeckliste.pdf",  # noqa: E501
+    r"https://www.freiburg.de/pb/site/Freiburg/*",
+    r"https://datavizcatalogue.com/*",
 ]
 
 # -- nbsphinx configuration --------------------------------------------------

docs/viz/diagram-anatomy/colors.rst

@@ -164,6 +164,6 @@ oder Divergenz darzustellen.
 .. figure:: gradient.png
 
 .. seealso::
-   * `Paul Tol <https://personal.sron.nl/~pault/>`_
+   * `Paul Tol <https://sronpersonalpages.nl/~pault/>`_
    * `bokeh Accessible Palettes
      <https://docs.bokeh.org/en/latest/docs/reference/palettes.html#accessible-palettes>`_

docs/viz/types/index.rst

@@ -11,7 +11,7 @@ zunächst den Zweck der Visualisierung und wählt dann den geeigneten Diagrammty
      <https://ft-interactive.github.io/visual-vocabulary/>`_
    * `Financial-Times/chart-doctor//visual-vocabulary
      <https://github.com/Financial-Times/chart-doctor/tree/main/visual-vocabulary>`_
-   * `The Data Visualisation Catalogue <https://datavizcatalogue.com>`_
+   * `The Data Visualisation Catalogue <https://datavizcatalogue.com/>`_
 
 Datentypen
 ----------

docs/writing/accessibility.rst

@@ -123,7 +123,7 @@ Namen und Symbole für Videos
   .. seealso::
      * `Captions/Subtitles <https://www.w3.org/WAI/media/av/captions/>`_
      * `508 Accessible Videos – How to Caption Videos
-       <https://digital.gov/2014/06/30/508-accessible-videos-how-to-caption-videos/>`_
+       <https://web.archive.org/web/20250121043050/https://digital.gov/2014/06/30/508-accessible-videos-how-to-caption-videos/>`_
      * `BBC Subtitle Guidelines <https://www.bbc.co.uk/accessibility/forproducts/guides/subtitles/>`_
 
 Medienalternativen bereitstellen