docs: release notes for 1.48 #30

Job	Run time
ubuntu-22.04 (chromium - Node.js 18)	13m 51s
ubuntu-20.04 (chromium tip-of-tree)	13m 57s
ubuntu-22.04 (firefox - Node.js 18)	25m 47s
Installation Test ubuntu-latest	10m 36s
ubuntu-22.04 (webkit - Node.js 18)	18m 10s
Installation Test macos-latest	9m 20s
ubuntu-22.04 (chromium - Node.js 20)	13m 23s
Installation Test windows-latest	16m 48s
ubuntu-22.04 (chromium - Node.js 22)	13m 27s
VSCode Extension	26m 53s
Test Runner (ubuntu-latest, 18, 1, 2)	28m 8s
Test Runner (ubuntu-latest, 18, 2, 2)	4m 48s
Web Components	1m 44s
Test Runner (windows-latest, 18, 1, 2)	38m 16s
Test Runner (windows-latest, 18, 2, 2)	7m 47s
Test Runner (macos-latest, 18, 1, 2)	19m 47s
Test Runner (macos-latest, 18, 2, 2)	2m 54s
Test Runner (ubuntu-latest, 20, 1, 2)	25m 36s
Test Runner (ubuntu-latest, 20, 2, 2)	4m 9s
Test Runner (ubuntu-latest, 22, 1, 2)	26m 44s
Test Runner (ubuntu-latest, 22, 2, 2)	4m 28s
	5h 26m 33s

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