Math.NET Numerics: 4.13.0 docs update

ReleaseNotes.html

@@ -59,6 +59,12 @@
                     
 <h1><a name="Math-NET-Numerics-Release-Notes" class="anchor" href="#Math-NET-Numerics-Release-Notes">Math.NET Numerics Release Notes</a></h1>
 <p><a href="ReleaseNotes.html">Math.NET Numerics</a> | <a href="ReleaseNotes-MKL.html">MKL Provider</a> | <a href="ReleaseNotes-OpenBLAS.html">OpenBLAS Provider</a> | <a href="ReleaseNotes-Data.html">Data Extensions</a></p>
+<h3><a name="4-13-0-2020-12-30" class="anchor" href="#4-13-0-2020-12-30">4.13.0 - 2020-12-30</a></h3>
+<ul>
+<li>Linear Algebra: sparse solver native provider <em>~Jong Hyun Kim</em></li>
+<li>Polynomial: fix handling of zero polynomials <em>~Jakub Bialogrodzki</em></li>
+<li>AppSwitches support to disable native providers or their probing</li>
+</ul>
 <h3><a name="4-12-0-2020-08-92" class="anchor" href="#4-12-0-2020-08-92">4.12.0 - 2020-08-92</a></h3>
 <ul>
 <li>Linear Algebra: allow zero-length vectors and matrices <em>~Evangelink</em></li>