Documentation: Wrong directory for YML files

The documentation points the location for YML files : config/opensearch-security
But actually used : plugins/opensearch-security/securityconfig

@sandyabcde The security config files have been moved to new location (config/opensearch-security) according to release notes of 2.0 and pull request 1749

I’ve found that for some reason the documentation has a new securityconfig folder in version 1.3.x and 2.0