About category changes (#1875)

Co-authored-by: Freddy <freddy@privacyguides.org>
Co-authored-by: matchboxbananasynergy <107055883+matchboxbananasynergy@users.noreply.github.com>
Co-authored-by: mfwmyfacewhen <94880365+mfwmyfacewhen@users.noreply.github.com>
Co-authored-by: Kai Tebay <95620167+KaiTebay@users.noreply.github.com>

docs/about/services.md

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+# Privacy Guides Services
+
+We run a number of web services to test out features and promote cool decentralized, federated, and/or open-source projects. Many of these services are available to the public and are detailed below.
+
+[:material-comment-alert: Report an issue](https://discuss.privacyguides.net/c/services/2){ .md-button .md-button--primary }
+
+## Discourse
+
+- Domain: [discuss.privacyguides.net](https://discuss.privacyguides.net)
+- Availability: Public
+- Source: [github.com/discourse/discourse](https://github.com/discourse/discourse)
+
+## Gitea
+
+- Domain: [code.privacyguides.dev](https://code.privacyguides.dev)
+- Availability: Invite-Only  
+Access may be granted upon request to any team working on *Privacy Guides*-related development or content.
+- Source: [snapcraft.io/gitea](https://snapcraft.io/gitea)
+
+## Matrix
+
+- Domain: [matrix.privacyguides.org](https://matrix.privacyguides.org)
+- Availability: Invite-Only  
+Access may be granted upon request to Privacy Guides team members, Matrix moderators, third-party Matrix community administrators, Matrix bot operators, and other individuals in need of a reliable Matrix presence.
+- Source: [github.com/spantaleev/matrix-docker-ansible-deploy](https://github.com/spantaleev/matrix-docker-ansible-deploy)
+
+## SearXNG
+
+- Domain: [search.privacyguides.net](https://search.privacyguides.net)
+- Availability: Public
+- Source: [github.com/searxng/searxng-docker](https://github.com/searxng/searxng-docker)