Add Determinate Nix 3.3.0 release notes

Author: cole-h

doc/manual/source/SUMMARY.md.in

@@ -128,6 +128,7 @@
   - [Contributing](development/contributing.md)
 - [Determinate Nix Release Notes](release-notes-determinate/index.md)
   - [Changes between Nix and Determinate Nix](release-notes-determinate/changes.md)
+  - [Release 3.3.0 (2025-04-11)](release-notes-determinate/rl-3.3.0.md)
   - [Release 3.1.0 (2025-03-27)](release-notes-determinate/rl-3.1.0.md)
   - [Release 3.0.0 (2025-03-04)](release-notes-determinate/rl-3.0.0.md)
 - [Nix Release Notes](release-notes/index.md)

doc/manual/source/release-notes-determinate/changes.md

@@ -1,9 +1,11 @@
 # Changes between Nix and Determinate Nix
 
-This section lists the differences between upstream Nix 2.24 and Determinate Nix 3.1.0.
+This section lists the differences between upstream Nix 2.24 and Determinate Nix 3.3.0.
 
 * In Determinate Nix, flakes are stable. You no longer need to enable the `flakes` experimental feature.
 
 * In Determinate Nix, the new Nix CLI (i.e. the `nix` command) is stable. You no longer need to enable the `nix-command` experimental feature.
 
 * Determinate Nix has a setting [`json-log-path`](@docroot@/command-ref/conf-file.md#conf-json-log-path) to send a copy of all Nix log messages (in JSON format) to a file or Unix domain socket.
+
+* Determinate Nix has made `nix profile install` an alias to `nix profile add`, a more symmetrical antonym of `nix profile remove`.

doc/manual/source/release-notes-determinate/rl-3.3.0.md

@@ -0,0 +1,5 @@
+# Release 3.3.0 (2025-04-11)
+
+* Based on [upstream Nix 2.28.1](../release-notes/rl-2.28.md).
+
+* The `nix profile install` command is now an alias to `nix profile add`, a more symmetrical antonym of `nix profile remove`.