Update drupal/flag requirement from 4.0-beta4 to 4.0.0-beta5 (#3669)

Updates the requirements on drupal/flag to permit the latest version.

---
updated-dependencies:
- dependency-name: drupal/flag
  dependency-type: direct:production
...

Signed-off-by: dependabot[bot] <[email protected]>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

composer.json

@@ -74,7 +74,7 @@
         "drupal/extlink": "2.0.2",
         "drupal/field_group": "3.6.0",
         "drupal/field_group_link": "3.1.0",
-        "drupal/flag": "4.0-beta4",
+        "drupal/flag": "4.0.0-beta5",
         "drupal/google_tag": "2.0.6",
         "drupal/honeypot": "2.1.4",
         "drupal/image_widget_crop": "2.4.0",