Tweak typesense indexing.

Author: Layoric

search-server/typesense-scraper/typesense-scraper-config.json

@@ -9,10 +9,9 @@
   "selectors": {
     "default": {
       "lvl0": "article h1",
-      "lvl1": "article h2",
-      "lvl2": "article h3",
-      "lvl3": "article h4",
-      "lvl4": "article h5",
+      "lvl1": "article h3",
+      "lvl2": "article h4",
+      "lvl3": "article h5",
       "text": "article p, .content ul li, .content table tbody tr"
     }
   },