Documentation: Add v2.20.7 changelog (#12100)

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Co-authored-by: github-actions <41898282+github-actions[bot]@users.noreply.github.com>
Co-authored-by: shamoon <4887959+shamoon@users.noreply.github.com>

docs/changelog.md

@@ -1,5 +1,23 @@
 # Changelog
 
+## paperless-ngx 2.20.7
+
+### Bug Fixes
+
+-   Performance fix: use subqueries to improve object retrieval in large installs [@shamoon](https://github.com/shamoon) ([#11950](https://github.com/paperless-ngx/paperless-ngx/pull/11950))
+-   Fix: correct user dropdown button icon styling [@shamoon](https://github.com/shamoon) ([#12092](https://github.com/paperless-ngx/paperless-ngx/issues/12092))
+-   Fix: fix broken docker create_classifier command in 2.20.6 [@shamoon](https://github.com/shamoon) ([#11965](https://github.com/paperless-ngx/paperless-ngx/issues/11965))
+
+### All App Changes
+
+<details>
+<summary>3 changes</summary>
+
+-   Performance fix: use subqueries to improve object retrieval in large installs [@shamoon](https://github.com/shamoon) ([#11950](https://github.com/paperless-ngx/paperless-ngx/pull/11950))
+-   Fix: correct user dropdown button icon styling [@shamoon](https://github.com/shamoon) ([#12092](https://github.com/paperless-ngx/paperless-ngx/issues/12092))
+-   Fix: fix broken docker create_classifier command in 2.20.6 [@shamoon](https://github.com/shamoon) ([#11965](https://github.com/paperless-ngx/paperless-ngx/issues/11965))
+</details>
+
 ## paperless-ngx 2.20.6
 
 ### Bug Fixes