fix(deps): Downgraded elasticsearch dependency to avoid including ESM dependencies

Author: andris9

.ncurc.js

@@ -8,6 +8,7 @@ module.exports = {
         'chai',
         'js-beautify',
         'ical.js',
+        '@elastic/elasticsearch',
 
         // api changes, check and fix
         'eslint',

package-lock.json

@@ -43,7 +43,7 @@
         "@bugsnag/js": "8.1.2",
         "@bull-board/api": "6.5.3",
         "@bull-board/hapi": "6.5.3",
-        "@elastic/elasticsearch": "8.16.2",
+        "@elastic/elasticsearch": "8.15.3",
         "@hapi/bell": "13.0.2",
         "@hapi/boom": "10.0.1",
         "@hapi/cookie": "12.0.1",