Merge pull request #2085 from bumblecoder/bugfix/custom-filters-documentation-typo

Fix duplicate "Creating Custom Doctrine ORM filters" heading in documentation

Author: vinceAmstoutz

core/filters.md

@@ -411,7 +411,7 @@ If you need more information about creating custom filters, refer to the followi
 
 - [Creating Custom Doctrine ORM filters](../core/doctrine-filters.md#creating-custom-doctrine-orm-filters)
 - [Creating Custom Doctrine Mongo ODM filters](../core/doctrine-filters.md#creating-custom-doctrine-mongodb-odm-filters)
-- [Creating Custom Doctrine ORM filters](../core/elasticsearch-filters.md#creating-custom-elasticsearch-filters)
+- [Creating Custom Elasticsearch Filters](../core/elasticsearch-filters.md#creating-custom-elasticsearch-filters)
 
 ## ApiFilter Attribute