fix: Guide content path for CODEOWNERS (#11148)

fix: update guide path

Co-authored-by: kodiakhq[bot] <49736102+kodiakhq[bot]@users.noreply.github.com>

Author: Jiralite

.github/CODEOWNERS

@@ -7,7 +7,7 @@ package.json @discordjs/core
 pnpm-lock.yaml @discordjs/core
 
 /apps/guide/ @discordjs/website @discordjs/guide
-/apps/guide/src/content/ @discordjs/guide
+/apps/guide/content/ @discordjs/guide
 /apps/website/ @discordjs/website
 
 /packages/actions/ @discordjs/actions