Add a notification to README for v3.x version of the library #3247

Job	Run time
build-docstrings	7m 38s
pytest (windows-latest)	36m 26s
build-linux-armhf (rpi-bookworm)	11m 57s
pytest (ubuntu-latest)	11m 8s
build-linux-arm64	1d 0h 0m 1s
build-linux-x86_64	1m 1s
build-macos (3.8, macos-14)	9m 54s
build-macos (3.8, macos-13)	10m 27s
pytest (macos-latest)	11m 45s
build-macos (3.9, macos-14)	8m 14s
build-macos (3.12, macos-13)	10m 31s
build-windows-x86_64 (3.7, x64)	22m 46s
build-macos (3.10, macos-13)	20m 18s
build-macos (3.9, macos-13)	13m 37s
build-macos (3.10, macos-14)	7m 46s
build-macos (3.11, macos-14)	10m 14s
build-macos (3.13, macos-14)	15m 49s
build-windows-x86_64 (3.9, x64)	19m 30s
build-windows-x86_64 (3.7, x86)	20m 9s
build-macos (3.11, macos-13)	11m 3s
build-windows-x86_64 (3.8, x86)	18m 50s
build-linux-armhf (rpi-bullseye)	57m 37s
build-macos (3.12, macos-14)	9m 24s
build-windows-x86_64 (3.10, x64)	18m 43s
build-windows-x86_64 (3.8, x64)	10m 45s
build-windows-x86_64 (3.10, x86)	20m 11s
build-windows-x86_64 (3.9, x86)	19m 36s
build-windows-x86_64 (3.11, x64)	10m 7s
build-windows-x86_64 (3.12, x86)	19m 10s
build-windows-x86_64 (3.13, x86)	18m 58s
build-windows-x86_64 (3.13, x64)	10m 7s
build-windows-x86_64 (3.11, x86)	19m 2s
build-macos (3.13, macos-13)	9m 50s
build-windows-x86_64 (3.12, x64)	9m 55s
notify_hil_workflow	-1s
release	0s
deploy	0s
	1d 8h 32m 28s

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