(DOCSP-44729): Clarified step for selecting and terminating a backup job. (#493)

@Vodyanoy17 and @kanchana-mongodb, I clarified the following step for
selecting the backup job to terminate.

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- [DOCSP-44729](https://jira.mongodb.org/browse/DOCSP-44729)
-
[STAGING](https://deploy-preview-493--10gen-docs-ops-manager.netlify.app/tutorial/stop-restart-terminate-backup/#find-then-force-terminate-the-backup-job)

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(cherry picked from commit 287e633)

Author: corryroot

source/includes/steps-force-terminate-backup.yaml

@@ -13,8 +13,10 @@ level: 4
 ref: force-terminate-the-backup
 content: |
 
-  a. Click on the Backup Job you want to terminate.
+  a. Click on the :guilabel:`Replica Set ID` for the Backup Job to 
+     terminate.
   b. Click the :guilabel:`Force Terminate` link for that job.
-  c. On the :guilabel:`Force Terminate Backup` modal, click :guilabel:`Force Terminate`.
+  c. On the :guilabel:`Force Terminate Backup` modal, click 
+     :guilabel:`Force Terminate`.
 
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