(DOCSP-45717) Adds note about trailing slash. (#597)

<!-- Add a description of your PR here (optional) -->

- [DOCSP-45717](https://jira.mongodb.org/browse/DOCSP-45717)
-
[STAGING](https://deploy-preview-597--10gen-docs-ops-manager.netlify.app/admin/backup/daemons-page/)

### Self-Review Checklist

- [ ]
[Define](https://wiki.corp.mongodb.com/display/DE/Taxonomy+tagging+instructions)
taxonomy
[values](https://wiki.corp.mongodb.com/display/DE/Docs+Taxonomy) at top
of page.
- [ ] Add genre facets (tutorial or reference), as in this [example
PR](10gen/cloud-docs#5042).
- [ ] Add programmingLanguage (if necessary).
- [ ] Add meta keywords (if necessary).
- [ ] Resolve any new warnings or errors in the build.
- [ ] Proofread for spelling and grammatical errors.
- [ ] Check staging for rendering issues.
- [ ] Confirm links are working.

Author: erabil-mdb

source/admin/backup/daemons-page.txt

@@ -19,9 +19,11 @@ page. Changes can take up to 5 minutes to take effect.
 
 Click :guilabel:`Pre-Configure New Daemon` at the bottom of the page if
 you want to add a daemon but do not want it to take new jobs. Type the
-``<machine>:<roothead path>`` in the text field above
-:guilabel:`Pre-Configure New Daemon`. Click the button to configure the
-new Backup Daemon.
+``<machine>:/<roothead path>/`` in the text field above
+:guilabel:`Pre-Configure New Daemon`. *You must include a slash at the end* (``/``) or 
+the Backup Daemon won't run and instead generates a Java exception error in the 
+Backup Daemon logs.
+Click the button to configure the new Backup Daemon.
 
 For each daemon, the page lists the server name, configuration,
 :opsmgr:`head </reference/glossary/#std-term-head-database>` space used, head space free, the number of