fix: resolve mkdocs build errors from deprecated extensions (#410)

- Update emoji extension from materialx.emoji to material.extensions.emoji
  (materialx is deprecated since mkdocs-material 9.4)
- Add alternate_style: true to pymdownx.tabbed (required in pymdownx 10.x)
- Pin pygments<2.20 to avoid NoneType crash in highlight formatter
- Remove unrecognised repo_issue/repo_discussion config keys

Verified: mkdocs build succeeds locally with pinned dependencies.

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

Author: vicperdana

mkdocs.yml

@@ -6,9 +6,6 @@ site_author: Microsoft
 repo_url: https://github.com/Azure/PSDocs.Azure/
 edit_uri: blob/main/docs/
 
-repo_issue: https://github.com/Azure/PSDocs.Azure/issues
-repo_discussion: https://github.com/Azure/PSDocs.Azure/discussions
-
 extra_css:
   - assets/stylesheets/extra.css
 
@@ -70,13 +67,14 @@ markdown_extensions:
   - pymdownx.highlight
   - pymdownx.superfences
   - pymdownx.pathconverter
-  - pymdownx.tabbed
+  - pymdownx.tabbed:
+      alternate_style: true
   - pymdownx.details
   - mdx_truly_sane_lists
   - pymdownx.tasklist
   - pymdownx.emoji:
-      emoji_index: !!python/name:materialx.emoji.twemoji
-      emoji_generator: !!python/name:materialx.emoji.to_svg
+      emoji_index: !!python/name:material.extensions.emoji.twemoji
+      emoji_generator: !!python/name:material.extensions.emoji.to_svg
   - toc:
       permalink: '#'
       separator: '-'

requirements-docs.txt

@@ -1,6 +1,7 @@
 mkdocs==1.6.1
-mkdocs-material==9.6.9
-pymdown-extensions==10.14.3
+mkdocs-material==9.7.6
+pymdown-extensions==10.21.2
+pygments==2.20.0
 mike==2.1.3
 mkdocs-simple-hooks==0.1.5
 mkdocs-git-revision-date-plugin==0.3.2