OEL-1280: Upgrade packages in composer.json.

Upgrade oe_content to 2.8.0 version.
Upgrade file_link to 2.6.0 version.

composer.json

@@ -21,7 +21,7 @@
         "drupal/ctools": "^3.7",
         "drupal/description_list_field": "^1.0@alpha",
         "drupal/drupal-extension": "~4.1",
-        "drupal/file_link": "^2.0.4",
+        "drupal/file_link": "^2.0.6",
         "drupal/pathauto": "^1.8",
         "drupal/search_api": "^1.21",
         "drupal/search_api_autocomplete": "^1.5",