Add changelog for 5.19.6 release

CHANGELOG.md

@@ -1,3 +1,12 @@
+# 5.19.6 (January 2025)
+
+- Fix image_to_html pixel unit [#441](https://github.com/ome/omero-py/pull/441)
+- Move repr_html to _ImageWrapper [#429](https://github.com/ome/omero-py/pull/429)
+- CLI: fix debugging level 9 [#439](https://github.com/ome/omero-py/pull/439)
+- Upgrade to macOS 14 Actions runner image [#440](https://github.com/ome/omero-py/pull/440)
+- Remove Python 3.8 from the testing matrix [#434](https://github.com/ome/omero-py/pull/434)
+- omero.HdfStorage.update: add size check on data.rowNumbers [#431](https://github.com/ome/omero-py/pull/431)
+
 # 5.19.5 (September 2024)
 
 - Prevent hang on exit while omero.client keepalive is active [#424](https://github.com/ome/omero-py/pull/424)