Backport PR #48623 on branch 1.5.x (REGR/DOC: Docs left navbar broke) (…

…#48625)

Backport PR #48623: REGR/DOC: Docs left navbar broke

Co-authored-by: Richard Shadrach <45562402+rhshadrach@users.noreply.github.com>

doc/_templates/sidebar-nav-bs.html

@@ -1,5 +1,5 @@
 <nav class="bd-links" id="bd-docs-nav" aria-label="Main navigation">
-  <div class="bd-toc-item active">
+  <div class="bd-toc-item navbar-nav">
     {% if pagename.startswith("reference") %}
     {{ generate_toctree_html("sidebar", maxdepth=4, collapse=True, includehidden=True, titles_only=True) }}
     {% else %}