Add description for profile_date

Author: fbertsch

schemas/telemetry/installation/installation.1.schema.json

@@ -73,6 +73,7 @@
       "type": "string"
     },
     "profile_date": {
+      "description": "Number of days since the epoch that the profile was created",
       "type": "integer"
     },
     "reason": {

templates/telemetry/installation/installation.1.schema.json

@@ -43,7 +43,8 @@
       "description": "device architecture"
     },
     "profile_date": {
-      "type": "integer"
+      "type": "integer",
+      "description": "Number of days since the epoch that the profile was created"
     },
     "created": {
       "type": "string"