docs(changelog): finalize changelog for 2.4.0 (#988)

Signed-off-by: Dariusz Duda <[email protected]>

Author: dariuszd21

docs/reference/changelog.rst

@@ -3,7 +3,7 @@ Changelog
 *********
 
 
-X.Y.Z (2025-MM-DD)
+2.4.0 (2025-01-23)
 ------------------
 
 New features:
@@ -18,6 +18,7 @@ Documentation:
 
 - Add missing links to GitHub releases.
 
+For a complete list of commits, check out the `2.4.0`_ release on GitHub.
 
 2.3.0 (2025-01-20)
 ------------------
@@ -734,6 +735,7 @@ For a complete list of commits, check out the `2.0.0`_ release on GitHub.
 .. _craft-cli issue #172: https://github.com/canonical/craft-cli/issues/172
 .. _Poetry: https://python-poetry.org
 
+.. _2.4.0: https://github.com/canonical/craft-parts/releases/tag/2.4.0
 .. _2.3.0: https://github.com/canonical/craft-parts/releases/tag/2.3.0
 .. _2.2.2: https://github.com/canonical/craft-parts/releases/tag/2.2.2
 .. _2.2.1: https://github.com/canonical/craft-parts/releases/tag/2.2.1