Redfish update test suite Force tags as per standard

Changes:
   - Update Tags names for the test suite

Note: Refer CONTRIBUTING.md for under Tags section
      documentation.

Tested:
   - NA

Change-Id: Ice5fa1a185876774d9e9bce4ff53f834b2a1f652
Signed-off-by: George Keishing <gkeishin@in.ibm.com>
diff --git a/redfish/update_service/test_redfish_signed_image_update.robot b/redfish/update_service/test_redfish_signed_image_update.robot
index 1c3779a..72d6518 100755
--- a/redfish/update_service/test_redfish_signed_image_update.robot
+++ b/redfish/update_service/test_redfish_signed_image_update.robot
@@ -25,7 +25,7 @@
 Test Setup               Printn
 Test Teardown            FFDC On Test Case Fail
 
-Force Tags   Signed_Upload_Test
+Force Tags               Redfish_Signed_Image_Update
 
 *** Variables ***