Apply suggestions from code review

Co-authored-by: Simon Cross <[email protected]>

Author: Ericgig

_includes/old_sidebar.html

@@ -6,10 +6,10 @@
          <strong>QuTiP 5.2.0</strong>:
          <ul>
            <li>June 6, 2025</li>
-           <li><a href="https://qutip.readthedocs.io/en/v5.2.0/installation.html">install</a></li>
-           <li><a href="https://qutip.readthedocs.io/en/v5.2.0/">docs</a></li>
+           <li><a href="https://qutip.readthedocs.io/en/qutip-5.2.x/installation.html">install</a></li>
+           <li><a href="https://qutip.readthedocs.io/en/qutip-5.2.x/">docs</a></li>
            <li><a href="https://github.com/qutip/qutip/releases/tag/v5.2.0">src</a></li>
-           <li><a href="https://qutip.readthedocs.io/en/v5.2.0/changelog.html">changelog</a></li>
+           <li><a href="https://qutip.readthedocs.io/en/qutip-5.2.x/changelog.html">changelog</a></li>
          </ul>
          <strong>QuTiP 4.7.6</strong>:
          <ul>

documentation.md

@@ -11,11 +11,11 @@ title: QuTiP Documentation
 <div class="row">
 <div class="col-md-3 col-md-offset-1">
 <img src="images/rtd.png" />
-<a href="https://qutip.readthedocs.io/en/v5.2.0/">Read the Docs</a>
+<a href="https://qutip.readthedocs.io/en/qutip-5.2.x/">Read the Docs</a>
 </div>
 <div class="col-md-3 col-md-offset-1">
 <img src="images/pdf.png" />
-<a href="https://readthedocs.org/projects/qutip/downloads/pdf/v5.2.0/">PDF documentation</a>
+<a href="https://readthedocs.org/projects/qutip/downloads/pdf/qutip-5.2.x/">PDF documentation</a>
 </div>
 </div>