fix: workaround Hugo Modules incompatibility with Bootstrap

"In Go Modules, the /vendor directory in a module has a special meaning, so they delete it from the bundle"

Enables Academic to be installed as a Hugo Module.

See https://github.com/gohugoio/hugo/issues/6945

assets/scss/main.scss

@@ -36,6 +36,6 @@ $sta-dark-home-section-odd: {{ $scr.Get "dark_home_section_odd" }};
 $sta-dark-home-section-even: {{ $scr.Get "dark_home_section_even" }};
 
 @import "bootstrap_variables";
-@import "vendor/bootstrap/bootstrap";
+@import "_vendor/bootstrap/bootstrap";
 @import "academic/academic";
 @import "custom";

layouts/partials/site_js.html

@@ -151,7 +151,7 @@
     {{ $js_academic := resources.Get "js/academic.js" }}
     {{ $js_academic_search := resources.Get "js/academic-search.js" }}
     {{ $js_algolia_search := resources.Get "js/algolia-search.js" }}
-    {{ $js_bootstrap := resources.Get "js/vendor/bootstrap.min.js" }}
+    {{ $js_bootstrap := resources.Get "js/_vendor/bootstrap.min.js" }}
     {{ $js_bundle := slice $js_bootstrap $js_linebreak $js_academic }}
     {{ if eq site.Params.search.engine 1 }}
       {{ $js_bundle = $js_bundle | append $js_academic_search }}