Add internal changes to changelog

CHANGELOG.md

@@ -11,6 +11,23 @@
   ([#1927](https://github.com/nextstrain/auspice/issues/1927))
 * Bugfix: Clicking on the icons for FULL and GRID layout now changes the layout, just like clicking on the text ([#1911](https://github.com/nextstrain/auspice/issues/1911))
 
+_Internal changes._
+
+* Added a "Cite this repository" button on the GitHub repo.
+  ([#1921](https://github.com/nextstrain/auspice/pull/1921))
+* Kept dependencies up to date.
+  ([#1443](https://github.com/nextstrain/auspice/pull/1443),
+   [#1923](https://github.com/nextstrain/auspice/pull/1923))
+* Improved TypeScript usage.
+  ([#1910](https://github.com/nextstrain/auspice/pull/1910),
+   [#1913](https://github.com/nextstrain/auspice/pull/1913),
+   [#1914](https://github.com/nextstrain/auspice/pull/1914),
+   [#1915](https://github.com/nextstrain/auspice/pull/1915))
+* Improved GitHub Actions usage.
+  ([#1916](https://github.com/nextstrain/auspice/pull/1916),
+   [#1920](https://github.com/nextstrain/auspice/pull/1920),
+   [#1929](https://github.com/nextstrain/auspice/pull/1929))
+
 ## version 2.61.2 - 2024/11/19