Update doc for version "gromacs-2026"

Author: web-flow

gromacs-2026/colvars-refman-gromacs.html

@@ -15,7 +15,7 @@
 </p><!--l. 141--><p class="noindent"><span class="colorbox" id="colorbox1"> </span></p><div class="minipage"><!--l. 180--><math display="inline" xmlns="http://www.w3.org/1998/Math/MathML"><mspace class="thinspace" width="0.17em"></mspace></math><br class="newline"/>
 <!--l. 180--><p class="noindent"><span class="phvb8t-x-x-248">COLLECTIVE VARIABLES MODULE</span><br class="newline"/>
 </p><!--l. 180--><p class="noindent"><span class="phvb8t-x-x-248">Reference manual for GROMACS</span><br class="newline"/>
-</p><!--l. 180--><p class="noindent"><br class="newline"/>Code version: 2025-08-30<br class="newline"/>
+</p><!--l. 180--><p class="noindent"><br class="newline"/>Code version: 2025-09-05<br class="newline"/>
 </p><!--l. 180--><p class="noindent">Updated versions of this manual: [<a href="https://colvars.github.io/gromacs-2026/colvars-refman-gromacs.html">GROMACS</a>] [<a href="https://colvars.github.io/gromacs-2026/colvars-refman-lammps.html">LAMMPS</a>] [<a href="https://colvars.github.io/gromacs-2026/colvars-refman-namd.html">NAMD</a>] [<a href="https://colvars.github.io/gromacs-2026/colvars-refman-tinkerhp.html">Tinker-HP</a>] [<a href="https://colvars.github.io/gromacs-2026/colvars-refman-vmd.html">VMD</a>]</p></div>
 <!--l. 184--><p class="indent"> <img alt="Colvars logo" class="cover_picture" src="cover-512px.jpg"/> <br class="newline"/><span class="phvr8t-x-x-120">Alejandro Bernardin, Haochuan Chen, Jeffrey R. Comer, Giacomo Fiorin, Haohao Fu, J</span><span class="phvr8t-x-x-120">é</span><span class="phvr8t-x-x-120">r</span><span class="phvr8t-x-x-120">ô</span><span class="phvr8t-x-x-120">me</span>
 <span class="phvr8t-x-x-120">H</span><span class="phvr8t-x-x-120">é</span><span class="phvr8t-x-x-120">nin, Axel Kohlmeyer, Fabrizio Marinelli, Hubert Santuz, Joshua V. Vermaas, Andrew D.</span>