(DOCSP-37765) Add year units to frequency and retention settings. (#40)

* (DOCSP-37765) Add year units to frequency and retention settings.

* (DOCSP-37765) Tech review.

* (DOCSP-37765) Copy review.

Author: lmkerbey-mdb

source/atlasbackuppolicy-custom-resource.txt

@@ -113,6 +113,8 @@ documentation to customize your specifications.
      Sunday.
    - Monthly: ``1`` through ``28`` and ``40``, where ``1`` is the first
      day of the month and ``40`` is the last day of the month.
+   - Yearly: ``1`` through ``12``, where ``1`` is the first day of
+     January, and ``12`` is the first day of December.
 
 .. setting:: spec.items.frequencyType
 
@@ -122,7 +124,7 @@ documentation to customize your specifications.
 
    String that indicates the frequency associated with the backup
    policy item. Accepted values are: ``hourly``, ``daily``, ``weekly``,
-   or ``monthly``.
+   ``monthly``, or ``yearly``.
 
    .. note::
 
@@ -138,7 +140,7 @@ documentation to customize your specifications.
    String that indicates the scope of the backup policy item. Together
    with :setting:`spec.items.retentionValue`, these settings define the
    length of time to retain snapshots. Accepted values are: ``days``,
-   ``weeks``, or ``months``.
+   ``weeks``, ``months``, or ``years``.
 
 .. setting:: spec.items.retentionValue