Reflect the current status of Unit on the community page

source/community.rst

@@ -8,6 +8,23 @@
 Community
 #########
 
+**********************************
+Maintenance and support guidelines
+**********************************
+
+Going forward, NGINX Unit will no longer receive new features or
+enhancements from the project maintainers. NGINX Unit is still open to
+community contributions.
+
+The team is focusing its limited capacity to keep NGINX Unit stable,
+secure and high-quality. Its focus will be on critical maintenance, such
+as for security issues, dependency upgrades, and resolving crashes or
+undefined behavior.
+
+************
+Discuss Unit
+************
+
 The `Discussions section <https://github.com/nginx/unit/discussions>`_ of the
 Unit repo is the main place for discussing any topics related to the NGINX Unit project.