fix(css): improve parsing recovery when encountering qualified rules inside CSS @page at-rule blocks#8905

dyc3 merged 2 commits intobiomejs:mainbiomejs/biome:mainfrom

ryan-m-walker:fix/improve-parsing-recovery-in-at-rule-blocksryan-m-walker/biome:fix/improve-parsing-recovery-in-at-rule-blocksCopy head branch name to clipboard