Tweak wording of alert description(2)

Author: gsmith-sas

samples/alerts/database/crunchy-pgdata-usage-high.yaml

@@ -7,7 +7,7 @@ groups:
     rules:
       - title: Crunchy PGData Usage High
         annotations:
-          description: "Checks to see /pgdata filesystem is more than 50% full.
+          description: "Checks to see /pgdata filesystem is more than 50% full."
           summary:
             /pgdata storage > 50% full. This typically happens when the WAL logs
             are increasing and not being cleared.