MNT: Prepare changelog for 1.6.0 RLS #321

Job	Run time
test-pyversions (3.11)	53s
test-pyversions (3.12)	58s
test-pyversions (3.13)	58s
test-pyversions (3.13t)	1m 15s
test-pyversions (3.10)	1m 4s
test-linux-macos (3.10, macos-13)	1m 24s
test-linux-macos (3.10, ubuntu-22.04)	1m 7s
test-pyversions (3.14-dev)	1m 7s
test-linux-macos (3.10, ubuntu-24.04-arm)	1s
test-linux-macos (3.10, macos-latest)	1m 0s
test-linux-macos (3.14-dev, ubuntu-22.04)	1m 9s
test-linux-macos (3.14-dev, macos-latest)	1m 13s
test-linux-macos (3.14-dev, ubuntu-24.04-arm)	1s
test-windows (3.10, x64, windows-latest)	1m 24s
test-windows (3.14-dev, x86, windows-2022)	2m 22s
test-pyversions (3.14t-dev)	1m 8s
test-windows (3.10, x86, windows-latest)	1m 33s
test-windows (3.14-dev, x64, windows-latest)	2m 10s
test-windows (3.10, x64, windows-2022)	1m 28s
test-linux-macos (3.14-dev, macos-13)	2m 56s
test-windows (3.10, x86, windows-2022)	1m 34s
test-windows (3.14-dev, x64, windows-2022)	2m 24s
test-windows (3.14-dev, x86, windows-latest)	2m 48s
test-windows (3.14t-dev, x86, windows-2022)	2m 7s
test-windows (3.14t-dev, x64, windows-2022)	2m 21s
test-windows (3.14t-dev, x64, windows-latest)	2m 17s
test-windows (3.14t-dev, x86, windows-latest)	2m 17s
check	0s
build_wheels	0s
build_sdist	0s
release	0s
	40m 59s

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