fix: correct azure.yml → azure.yaml reference

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

Author: diberry

articles/cosmos-db/quickstart-vector-store-dotnet.md

@@ -84,7 +84,7 @@ To provision resources:
     git clone https://github.com/Azure-Samples/cosmos-db-vector-samples.git
     ```
 
-1. Navigate to the root folder of the cloned repository (where `azure.yml` is located), for example:
+1. Navigate to the root folder of the cloned repository (where `azure.yaml` is located), for example:
 
     ```bash
     cd cosmos-db-vector-samples
@@ -306,4 +306,5 @@ In the preceding code, the `CosmosDBService` performs the following tasks:
 - [Vector search in Azure Cosmos DB](gen-ai/vector-search-overview.md)
 - [Document Indexer for Azure Cosmos DB (preview)](gen-ai/document-indexer.md)
 - [Vector embeddings in Azure Cosmos DB](gen-ai/vector-embeddings.md)
-- [Azure RBAC built-in roles](/azure/role-based-access-control/built-in-roles)
+- [Azure RBAC built-in roles](/azure/role-based-access-control/built-in-roles)
+