Merge pull request #20338 from github/repo-sync

repo sync

content/actions/reference/workflow-syntax-for-github-actions.md

@@ -799,7 +799,7 @@ Using the `working-directory` keyword, you can specify the working directory of
 
 ### Using a specific shell
 
-You can override the default shell settings in the runner's operating system using the `shell` keyword. You can use built-in `shell` keywords, or you can define a custom set of shell options.
+You can override the default shell settings in the runner's operating system using the `shell` keyword. You can use built-in `shell` keywords, or you can define a custom set of shell options. The shell command that is run internally executes a temporary file that contains the commands specifed in the `run` keyword.
 
 | Supported platform | `shell` parameter | Description | Command run internally |
 |--------------------|-------------------|-------------|------------------------|