chore(deps): update astro to v6

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Latest commit: 6f706f4

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[pkg-pr-new]

• example-playground

  npm i https://pkg.pr.new/ocavue/astrobook@205
  

  npm i https://pkg.pr.new/ocavue/astrobook/@astrobook/core@205
  

  npm i https://pkg.pr.new/ocavue/astrobook/@astrobook/types@205
  

  npm i https://pkg.pr.new/ocavue/astrobook/@astrobook/ui@205
  

commit: 6f706f4