chore: rename headful -> headed #2774

Job	Run time
Java_21 (webkit)	8m 41s
Java_21 (chromium)	6m 37s
dev (ubuntu-latest, chromium)	9m 55s
stable (macos-latest, chrome)	21m 17s
stable (ubuntu-latest, chrome)	6m 42s
stable (windows-latest, chrome)	9m 17s
Java_21 (firefox)	13m 48s
stable (macos-latest, msedge)	24m 38s
stable (windows-latest, msedge)	17m 25s
dev (windows-latest, chromium)	7m 9s
dev (ubuntu-latest, webkit)	18m 41s
dev (windows-latest, webkit)	30m 15s
dev (macos-latest, chromium)	7m 30s
dev (ubuntu-latest, firefox)	21m 43s
dev (windows-latest, firefox)	14m 37s
dev (macos-latest, firefox)	17m 52s
dev (macos-latest, webkit)	12m 30s
	4h 8m 37s

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