Use longtable for our document in PDF format

Previous commit applied longtable class to the next one, but this still
left the previous table prevent an earlier page break.

doc/latex.rst

@@ -1447,6 +1447,7 @@ Macros
   .. csv-table::
      :header: Name, ``maps argument #1 to:``
      :align: left
+     :class: longtable
      :delim: ;
 
      ``\sphinxstrong``;         ``\textbf{#1}``