fix: search_enabled -> bib_search (alshedivat#2560)

In alshedivat#2523, I did a copy&paste error with
alshedivat@07d6e61

I used the global `search_enabled` config key instead of the correct
`bib_search` key.

This PR fixed it.

_includes/bib_search.liquid

@@ -0,0 +1,4 @@
+{% if site.bib_search %}
+  <script src="{{ '/assets/js/bibsearch.js' | relative_url | bust_file_cache }}" type="module"></script>
+  <input type="text" id="bibsearch" spellcheck="false" autocomplete="off" class="search bibsearch-form-input" placeholder="Type to filter">
+{% endif %}

_includes/scripts/misc.liquid

@@ -37,11 +37,6 @@
 <script defer src="{{ '/assets/js/common.js' | relative_url | bust_file_cache }}"></script>
 <script defer src="{{ '/assets/js/copy_code.js' | relative_url | bust_file_cache }}" type="text/javascript"></script>
 
-<!-- Bibsearch Feature -->
-{% if site.search_enabled %}
-  <script src="{{ '/assets/js/bibsearch.js' | relative_url | bust_file_cache }}" type="module"></script>
-{% endif %}
-
 <!-- Jupyter Open External Links New Tab -->
 <script defer src="{{ '/assets/js/jupyter_new_tab.js' | relative_url | bust_file_cache }}"></script>
 

_pages/publications.md

@@ -9,9 +9,9 @@ nav_order: 2
 
 <!-- _pages/publications.md -->
 
-{% if site.search_enabled %}
-<input type="text" id="bibsearch" spellcheck="false" autocomplete="off" class="search bibsearch-form-input" placeholder="Type to filter">
-{% endif %}
+<!-- Bibsearch Feature -->
+
+{% include bib_search.liquid %}
 
 <div class="publications">