Merge pull request #114 from NHSDigital/build/gr-upgrade-packages

build: upgrade lxml, pyarrow

Author: georgeRobertson

CHANGELOG.md

@@ -1,3 +1,9 @@
+## v0.8.1 (2026-06-17)
+
+### Build
+- Update lxml from v4.6.4 to 6.1.1
+- Update pyarrow from 17.0.0 to 23.0.1
+
 ## v0.8.0 (2026-06-10)
 
 ### Feat