Remove outdated tags_file config

mkdocs.yml

@@ -1,22 +1,28 @@
 site_name: Using SPDX
-site_description: Information on how to use the System Package Data Exchange specification
-site_author: The Linux Foundation and its Contributors.
-site_url: https://spdx.github.io/using/  # set to the "root" of the site, to be combined with canonical_version
+site_description: Information on how to use the System Package Data Exchange (SPDX) specification
+site_author: The Linux Foundation and its Contributors
+site_url: https://spdx.github.io/using/
 repo_url: https://github.com/spdx/using/
-edit_uri: "edit/main/docs"  # set to an empty string to disable edit links;
-copyright: Using SPDX Copyright © 2024, The Linux Foundation and its Contributors.
+edit_uri: "edit/main/docs"  # set to an empty string to disable edit links
+copyright: Using SPDX Copyright © 2024-2025, The Linux Foundation and its Contributors.
 use_directory_urls: true
 theme:
   name: material
   favicon: images/favicon.png
   logo: images/logo-white.svg
   features:
     - content.action.edit
+    - navigation.instant
+    - navigation.instant.progress
+  palette:
+    - scheme: default
+      primary: indigo
+      accent: indigo
 plugins:
+- git-revision-date
 - search
 - social
-- tags:
-    tags_file: tags.md
+- tags
 markdown_extensions:
 - admonition
 - abbr

requirements.txt

@@ -1,2 +1,3 @@
 mkdocs==1.6.1
+mkdocs-git-revision-date-localized-plugin==1.4.7
 mkdocs-material[imaging]==9.6.22