Add missing line highlights in SinglePostPage.tsx (Part 7: RTK Query … #1496

Job	Run time
Check for changes	7s
Lint, Test, Build & Pack on Node ${{ matrix.node }}	0s
Test Published Artifact ${{ matrix.example }}	-1s
Test against dist	-1s
Test Types with TypeScript ${{ matrix.ts }}	-1s
Check package config with are-the-types-wrong	-1s
	3s

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