Update dependabot.yml file naming information to include the .yaml extension (#43123)

Co-authored-by: Sharra-writes <sharra-writes@github.com>
Co-authored-by: Copilot <175728472+Copilot@users.noreply.github.com>

Author: 3 people

content/code-security/concepts/supply-chain-security/about-the-dependabot-yml-file.md

@@ -43,7 +43,7 @@ The `dependabot.yml` file controls how {% data variables.product.prodname_depend
 
 ## Where to store the `dependabot.yml` file
 
-You must store this file in the `.github` directory of your repository in the default branch (typically `main`). The path is:  `.github/dependabot.yml`.
+You must store this file in the `.github` directory of your repository in the default branch (typically `main`), at `.github/dependabot.yml` or `.github/dependabot.yaml`.
 
 ## How the `dependabot.yml` file works