Merge pull request github#1415 from macedogm/patch-2

Update authenticating-with-github-apps.md

content/developers/apps/authenticating-with-github-apps.md

@@ -28,7 +28,7 @@ To generate a private key:
 {% data reusables.user-settings.developer_settings %}
 {% data reusables.user-settings.github_apps %}
 {% data reusables.user-settings.modify_github_app %}
-5. In "Private keys," click **Generate a private key**.
+5. In "Private keys", click **Generate a private key**.
 ![Generate private key](/assets/images/github-apps/github_apps_generate_private_keys.png)
 6. You will see a private key in PEM format downloaded to your computer. Make sure to store this file because GitHub only stores the public portion of the key.