fix: proper casing

Correct Markdown casing in README for consistency.

Signed-off-by: Zack Koppert <[email protected]>

Author: zkoppert

README.md

@@ -70,7 +70,7 @@ This action can be configured to authenticate with GitHub App Installation or Pe
 | `ORGANIZATION`       | false    |            | The organization to scan for stale repositories. If no organization is provided, this tool will search through repositories owned by the GH_TOKEN owner                                                                                                                 |
 | `ADDITIONAL_METRICS` | false    |            | Configure additional metrics like days since last release or days since last pull request. This allows for more detailed reporting on repository activity. To include both metrics, set `ADDITIONAL_METRICS: "release,pr"`                                              |
 | `SKIP_EMPTY_REPORTS` | false    | `true`     | Skips report creation when no stale repositories are identified. Setting this input to `false` means reports are always created, even when they contain no results.                                                                                                     |
-| `WORKFLOW_SUMMARY_ENABLED` | false | `false` | When set to `true`, automatically adds the stale repository report to the GitHub Actions workflow summary. This eliminates the need to manually add a step to display the markdown content in the workflow summary.                                                    |
+| `WORKFLOW_SUMMARY_ENABLED` | false | `false` | When set to `true`, automatically adds the stale repository report to the GitHub Actions workflow summary. This eliminates the need to manually add a step to display the Markdown content in the workflow summary.                                                    |
 
 ### Example workflow