Fix nginx: add text/javascript to sub_filter_types for GrampsWeb subpath rewriting (STI-91)

GrampsWeb serves JS files with Content-Type text/javascript, but nginx
sub_filter_types only listed application/javascript. This caused JS bundles
to pass through without path rewriting, resulting in API calls going to
/api/ instead of /ahnenforschung/api/ (404 errors on login).

Co-Authored-By: Paperclip <noreply@paperclip.ing>

deploy-production/nginx.conf

@@ -99,7 +99,7 @@ server {
         proxy_set_header Accept-Encoding "";
 
         # Apply sub_filter to HTML, JS, and CSS responses
-        sub_filter_types application/javascript text/css;
+        sub_filter_types application/javascript text/javascript text/css;
         sub_filter_once off;
 
         # HTML: set <base href> so the SPA router knows its prefix