Fix environment variables to match inputs with hyphens

Co-authored-by: Copilot Autofix powered by AI <175728472+Copilot@users.noreply.github.com>

Author: kohtala

content/actions/reference/workflows-and-actions/workflow-syntax.md

@@ -815,7 +815,7 @@ Input parameters defined for a Docker container must use `args`. For more inform
 
 ### Example of `jobs.<job_id>.steps[*].with`
 
-Defines the three input parameters (`first-name`, `middle-name`, and `last-name`) defined by the `hello-world` action. These input variables will be accessible to the `hello-world` action as `INPUT_FIRST_NAME`, `INPUT_MIDDLE_NAME`, and `INPUT_LAST_NAME` environment variables.
+Defines the three input parameters (`first-name`, `middle-name`, and `last-name`) defined by the `hello-world` action. These input variables will be accessible to the `hello-world` action as `INPUT_FIRST-NAME`, `INPUT_MIDDLE-NAME`, and `INPUT_LAST-NAME` environment variables.
 
 ```yaml
 jobs: