Label is not optional

The `label` property of `actions/upload-code-coverage` is not optional.

Author: asbjornu

content/code-security/how-tos/maintain-quality-code/set-up-code-coverage.md

@@ -60,7 +60,7 @@ After your tests generate a Cobertura XML report, upload it to {% data variables
 1. Replace the following values:
    * **`COVERAGE-FILE-PATH.xml`**: The path to your Cobertura XML report (for example, `coverage.xml` or `target/site/jacoco/cobertura.xml`).
    * **`LANGUAGE`**: The primary language of the code being covered (for example, `Python`, `Java`, `JavaScript`).
-   * **`LABEL`**: An optional label to identify this coverage report (for example, `code-coverage/pytest`).
+   * **`LABEL`**: A label to identify this coverage report (for example, `code-coverage/pytest`).
 1. Commit and push the workflow change.
 
 ### Full workflow example