Bump postcss from 8.5.2 to 8.5.3 #4116

Job	Run time
Build and check doc	6m 40s
Python 3.9 on ubuntu-latest	20m 2s
Python 3.10 on ubuntu-latest	20m 1s
Python 3.11 on ubuntu-latest	18m 1s
Check if wheel can be installed with PDM	1m 33s
Python 3.12 on ubuntu-latest	23m 21s
Check if wheel can be installed with pip	1m 8s
Python 3.10 on windows-2022	20m 15s
Python 3.10 on macos-latest	12m 33s
Check if wheel can be installed with using Poetry	1m 15s
Python 3.10 (Pydantic V1) on ubuntu-latest	20m 59s
Python 3.10 (Pandas V1) on ubuntu-latest	19m 20s
Python 3.10 (Minimal langchain) on ubuntu-latest	19m 5s
retry-on-failure	0s
	3h 4m 13s

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