build(deps): bump postcss from 8.5.10 to 8.5.26 #83

Job	Run time
Linux E2E (Docker)	2m 11s
Agent runtime suite	14s
Protocol suite	46s
Static checks	14s
Web app	54s
macOS build and protocol suite	57s
macOS E2E (WKWebView)	-1s
	5m 15s

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