Update proc-enabling-authentication-with-github.adoc (#838)

modules/authentication/proc-enabling-authentication-with-github.adoc

@@ -55,7 +55,7 @@ TIP: If you plan to make changes using the GitHub API, ensure that `Read and wri
 +
 `AUTH_GITHUB_APP_ID`:: Enter the saved **App ID**.
 `AUTH_GITHUB_CLIENT_ID`:: Enter the saved **Client ID**.
-`GITHUB_HOST_DOMAIN`:: Enter your GitHub host domain: `pass:c[https://github.com]` unless you are using GitHub Enterprise.
+`GITHUB_HOST_DOMAIN`:: Enter your GitHub host domain: `github.com` unless you are using GitHub Enterprise.
 `GITHUB_ORGANIZATION`:: Enter your GitHub organization name, such as `__<your_github_organization_name>__'.
 `GITHUB_ORG_URL`:: Enter `$GITHUB_HOST_DOMAIN/$GITHUB_ORGANIZATION`.
 `GITHUB_CLIENT_SECRET`:: Enter the saved **Client Secret**.