fix issue 21493 - Documentation broken hyperlink std.stdio

[aG0aep6G]

No description provided.

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Bugzilla references

Auto-close	Bugzilla	Severity	Description
✓	21493	trivial	Documentation broken hyperlink std.stdio

Testing this PR locally

If you don't have a local development environment setup, you can use Digger to test this PR:

dub run digger -- build "master + phobos#7732"

[PetarKirov]

Thanks for fix! The OP originally reported this on the @dlang-tour/core issue tracker, but I wasn't sure to which part he was specifically referring to.