v1.10.9
update --gcthreads section in command line options (#52645)
docs: fix edge case in rational number conversion `float(a//b)` (#56772)
add link to release notes on first page of manual (#25476)
Use https for downloading of unicode data from unicode.org (#45750)
Add inventory writing via DocumenterInventoryWritingBackport
Fix NEWS-update.jl for cases of empty issues list
Remove URLs with /latest and use correct, relative, (#34491)