fix(README): use .env.template instead of .env.example

Author: ardelato

README.md

@@ -7,7 +7,7 @@ Vigilo is a monitoring tool that automates Lighthouse audits and sends key metri
 1. Clone the repo
 2. Run `pnpm install`
 3. Run `pnpm run build`
-4. Run `cp .env.example .env`
+4. Run `cp .env.template .env`
 5. Add your Datadog API key and Datadog Application key to the `.env` file
 6. Run `cp urls.example.json urls.json`
 7. Add your URLs to the `urls.json` file