Update README

README.md

@@ -30,15 +30,15 @@ If not specified the root job folder will be used.
 #### `allow-external-github-orgs` (optional)
 A boolean value to allow external github orgs in the foreman manifest file.
 
-#### `github-api-url` (optional)
+If not specified, external github orgs will not be allowed.
 
+#### `github-api-url` (optional)
 Override for the GitHub API URL. By default GitHub Actions will supply this
 value as the current environment, which will usually be
 `https://api.github.com`.
 
-You shouldn't need to change unless working in GitHub Enterprise or a similar
-self-hosted environment.
+This parameter exists primarily to allow GitHub Enterprise to point back to
+GitHub Cloud to install publicly hosted tools.
 
-If not specified, external github orgs will not be allowed.
 ## License
 setup-foreman is available under the MIT license. See [LICENSE.txt](LICENSE.txt) or <https://opensource.org/licenses/MIT> for details.