docs: use `opengraph-image.tsx` for OG images in blog #6748

Job	Run time
Find path changes	20s
@turbo/types codegen check	0s
`with-tailwind` example	0s
Rust lints	0s
Turborepo rust check	0s
Turborepo Integration	0s
`basic` example	0s
Turborepo Test Summary	3s
`kitchen-sink` example	0s
`non-monorepo` example	0s
`with-svelte` example	0s
Turborepo Rust testing on ${{ matrix.os.name }}	0s
Cleanup / cleanup	3s
	26s

Provide feedback