Updated discussion templates

.github/DISCUSSION_TEMPLATE/announcement.yaml

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-body:
-- type: markdown
-  attributes:
-    value: |
-      > [!NOTE]
-      >
-      > **Discussions closed as of November 18, 2025**
-      >
-      > As outlined in our [blog post](https://squidfunk.github.io/mkdocs-material/blog/2025/11/18/goodbye-github-discussions/), we're closing our discussion board, giving the community a new home in our [Discord channel](https://discord.gg/hqXRNq9CjT) at [Zensical](https://zensical.org/). This means that it's not possible to create new discussions, or comment on existing ones. You can join our [Discord channel](https://discord.gg/hqXRNq9CjT) to continue the conversation, or, if you are a professional user, consider joining [Zensical Spark](https://zensical.org/spark/), our collaborative space for professionals.
-      >
-      > Thank you for your understanding.
-      >
-      > In case you have questions not directly related to Material for MkDocs, but to the wider ecosystem, consider creating an issue or a discussion on the respective repository. Here's a list of the most popular ecosystem projects, and their issue trackers and discussion boards:
-      >
-      > __MkDocs & Python Markdown__
-      >
-      > - [MkDocs] – [Issues][MkDocs issues], [Discussions][MkDocs discussions]
-      > - [Python Markdown] – [Issues][Python Markdown issues]
-      > - [Pymdown Extensions] – [Issues][Pymdown Extensions issues], [Discussions][Pymdown Extensions discussions]
-      >
-      > __Popular MkDocs plugins__
-      >
-      > - [Mike] – [Issues][Mike issues], [Discussions][Mike discussions]
-      > - [Macros] – [Issues][Macros issues], [Discussions][Macros discussions]
-      > - [Git Revision Date Localized] – [Issues][Git Revision Date Localized issues]
-      > - [Awesome Nav] – [Issues][Awesome Nav issues]
-      > - [Static i18n] – [Issues][Static i18n issues]
-      > - [MkDocs Literate Nav] – [Issues][MkDocs Literate Nav issues]
-      >
-      > [MkDocs]: https://github.com/mkdocs/mkdocs
-      > [MkDocs issues]: https://github.com/mkdocs/mkdocs/issues
-      > [MkDocs discussions]: https://github.com/mkdocs/mkdocs/discussions
-      > [Pymdown Extensions]: https://github.com/facelessuser/pymdown-extensions
-      > [Pymdown Extensions discussions]: https://github.com/facelessuser/pymdown-extensions/discussions
-      > [Pymdown Extensions issues]: https://github.com/facelessuser/pymdown-extensions/issues
-      > [Python Markdown]: https://github.com/Python-Markdown/markdown
-      > [Python Markdown issues]: https://github.com/Python-Markdown/markdown/issues
-      > [Mike]: https://github.com/mike
-      > [Mike issues]: https://github.com/mike/issues
-      > [Mike discussions]: https://github.com/mike/discussions
-      > [Macros]: https://github.com/fralau/mkdocs-macros-plugin
-      > [Macros issues]: https://github.com/fralau/mkdocs-macros-plugin/issues
-      > [Macros discussions]: https://github.com/fralau/mkdocs-macros-plugin/discussions
-      > [Git Revision Date Localized]: https://github.com/timvink/mkdocs-git-revision-date-localized-plugin
-      > [Git Revision Date Localized issues]: https://github.com/timvink/mkdocs-git-revision-date-localized-plugin/issues
-      > [Awesome Nav]: https://github.com/lukasgeiter/mkdocs-awesome-nav
-      > [Awesome Nav issues]: https://github.com/lukasgeiter/mkdocs-awesome-nav/issues
-      > [Static i18n]: https://github.com/ultrabug/mkdocs-static-i18n
-      > [Static i18n issues]: https://github.com/ultrabug/mkdocs-static-i18n/issues
-      > [Static i18n discussions]: https://github.com/ultrabug/mkdocs-static-i18n/discussions
-      > [MkDocs Literate Nav]: https://github.com/oprypin/mkdocs-literate-nav
-      > [MkDocs Literate Nav issues]: https://github.com/oprypin/mkdocs-literate-nav/issues
-- type: dropdown
-  id: download
-  attributes:
-    label: "​"
-    options: []
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