Add link to EFCore.NamingConventions

Closes #2156

entity-framework/core/extensions/index.md

@@ -138,14 +138,12 @@ Allow full-featured Entity Framework Core queries against [SQL Server Temporal H
 
 [GitHub repository](https://github.com/VantageSoftware/EFCore.TimeTraveler)
 
-
 ### EntityFrameworkCore.TemporalTables
 
 Extension library for Entity Framework Core which allows developers who use SQL Server to easily use temporal tables. For EF Core: 2.
 
 [GitHub repository](https://github.com/findulov/EntityFrameworkCore.TemporalTables)
 
-
 ### EntityFrameworkCore.Cacheable
 
 A high-performance second-level query cache. For EF Core: 2.
@@ -170,3 +168,9 @@ Extends your DbContext with high-performance bulk operations: BulkSaveChanges, B
 Add support for calling extension methods in linq lambdas. For EF Core: 3.1
 
 [GitHub repository](https://github.com/ClaveConsulting/Expressionify)
+
+### EFCore.NamingConventions
+
+Makes all your database tables and columns use a naming convention, such as `snake_case` or `UPPERCASE`. Useful especially for PostgreSQL but works on any database.
+
+[GitHub repository](https://github.com/efcore/EFCore.NamingConventions)