Apply suggested fix to docs/users/how-to-install.md from Copilot Autofix

Co-authored-by: Copilot Autofix powered by AI <223894421+github-code-quality[bot]@users.noreply.github.com>

Author: teolemon

docs/users/how-to-install.md

@@ -23,7 +23,7 @@ Once [docker](https://docs.docker.com/engine/install/) and [docker compose](http
 
 ## Settings
 
-All configuration are passed through environment variables to services through the use of a `.env` file. A sample `.env` file is provided in the repository, you will need to edit this file to suit your needs.
+All configuration is passed through environment variables to services through the use of a `.env` file. A sample `.env` file is provided in the repository, you will need to edit this file to suit your needs.
 
 The only required change is to set the `CONFIG_PATH` variable to the path of your YAML configuration file. This file is used to configure the search-a-licious indexer and search services. See the [create your configuration in tutorial](./tutorial.md#create-a-configuration-file)