aapcs64: fix broken link

[yury-khrustalev]

Fixes #347

[smithp35]

I think I've worked out how to do this without changing the user visible text, see inline comment.

[smithp35]

There is an invisible anchor on line 1289 that this is supposed to target, which is close to returns normally

.. _`each normal return`:

I've been trying to get that to work, but have been failing [1]

However as that anchor is invisible, we can just rename it:

.. _`every time`:

Then in each of the references we can just use

`every time`_

I've checked that works with rstcheck and rst2pdf and doesn't need any wording or location changes.

[1]
I expect the rendering problems are caused by:

`every time <each normal return>`_

Which seems to interpret each normal return as a hyperlink.

According to Sphinx https://www.sphinx-doc.org/en/master/usage/referencing.html#role-ref

we should be using

:ref:`every time <each normal return>`

But I can't get our rst2pdf or rstcheck to understand :ref:

[yury-khrustalev]

Thanks, I've updated patch as recommended.

[smithp35]

LGTM, thanks. Will merge as this is NFC.