libstdc++: Document change in __int128 traits [PRPR96710]

libstdc++-v3/ChangeLog:

	PR libstdc++/96710
	* doc/xml/manual/evolution.xml: Document change or __int128.
	* doc/html/manual/api.html: Regenerate.

Author: jwakely

libstdc++-v3/doc/html/manual/api.html

@@ -512,4 +512,7 @@
 </p></div><div class="section"><div class="titlepage"><div><div><h3 class="title"><a id="api.rel_16"></a><code class="constant">16</code></h3></div></div></div><p>
 Deprecated the non-standard overload of <code class="code">std::fabs</code> for
 <code class="code">std::complex</code> arguments.
+</p><p>
+Made <code class="code">std::is_integral_v&lt;__int128&gt;</code> true for strict
+<code class="code">-std</code> dialects.
 </p></div></div><div class="navfooter"><hr /><table width="100%" summary="Navigation footer"><tr><td width="40%" align="left"><a accesskey="p" href="abi.html">Prev</a> </td><td width="20%" align="center"><a accesskey="u" href="appendix_porting.html">Up</a></td><td width="40%" align="right"> <a accesskey="n" href="backwards.html">Next</a></td></tr><tr><td width="40%" align="left" valign="top">ABI Policy and Guidelines </td><td width="20%" align="center"><a accesskey="h" href="../index.html">Home</a></td><td width="40%" align="right" valign="top"> Backwards Compatibility</td></tr></table></div></body></html>

libstdc++-v3/doc/xml/manual/evolution.xml

@@ -1157,6 +1157,11 @@ Nested <code>result_type</code> and <code>argument_type</code> removed from
 Deprecated the non-standard overload of <code>std::fabs</code> for
 <code>std::complex</code> arguments.
 </para>
+
+<para>
+Made <code>std::is_integral_v&lt;__int128&gt;</code> true for strict
+<code>-std</code> dialects.
+</para>
 </section>
 
 </section>