Add SEO Roadmap and correct Elasticsearch link (#10364)

readme.md

@@ -83,6 +83,7 @@ Here is the list of available roadmaps with more being actively worked upon.
 - [Angular Roadmap](https://roadmap.sh/angular)
 - [Node.js Roadmap](https://roadmap.sh/nodejs)
 - [PHP Roadmap](https://roadmap.sh/php)
+- [SEO Roadmap](https://roadmap.sh/seo)
 - [WordPress Roadmap](https://roadmap.sh/wordpress)
 - [Laravel Roadmap](https://roadmap.sh/laravel)
 - [GraphQL Roadmap](https://roadmap.sh/graphql)
@@ -97,7 +98,7 @@ Here is the list of available roadmaps with more being actively worked upon.
 - [Spring Boot Roadmap](https://roadmap.sh/spring-boot)
 - [Design System Roadmap](https://roadmap.sh/design-system)
 - [PostgreSQL Roadmap](https://roadmap.sh/postgresql-dba)
-- [ElasticSearch Roadmap](https://roadmap.sh/elasticsearch)
+- [Elasticsearch Roadmap](https://roadmap.sh/elasticsearch)
 - [SQL Roadmap](https://roadmap.sh/sql)
 - [Redis Roadmap](https://roadmap.sh/redis)
 - [Blockchain Roadmap](https://roadmap.sh/blockchain)