fix link to Creating a Restore CR or rename file

[xerc]

@ https://docs.openshift.com/container-platform/4.14/backup_and_restore/index.html#backing-up-and-restoring-applications
"You restore application backups by creating a Restore (CR). See Creating a Restore CR"

BROKEN https://docs.openshift.com/container-platform/4.14/backup_and_restore/application_backup_and_restore/backing_up_and_restoring/oadp-creating-backup-cr-doc.html#backing-up-applications
WORKING https://docs.openshift.com/container-platform/4.14/backup_and_restore/application_backup_and_restore/backing_up_and_restoring/oadp-creating-backup-cr.html#backing-up-applications

-- -doc

btw/ did not make a PR cause there might be thoughts about naming
ref. https://github.com/search?q=repo%3Aopenshift%2Fopenshift-docs+-backup-cr&type=code

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[RichardHoch]

/remove-lifecycle stale

[RichardHoch]

@anarnold97 broken link in OADP doc.