Clarify the power levels integer range

Signed-off-by: Johannes Becker <j.becker@famedly.com>

data/event-schemas/schema/m.room.power_levels.yaml

@@ -5,6 +5,8 @@ description: |-
   This event specifies the minimum level a user must have in order to perform a
   certain action. It also specifies the levels of each user in the room.
 
+  The allowed range of power levels is specified by the [Canonical JSON specification](https://spec.matrix.org/v1.3/appendices/#canonical-json).
+
   If a `user_id` is in the `users` list, then that `user_id` has the
   associated power level. Otherwise they have the default level
   `users_default`. If `users_default` is not supplied, it is assumed to be
@@ -56,8 +58,8 @@ properties:
         type: object
       events_default:
         description: |-
-            The default level required to send message events. Can be
-            overridden by the `events` key.  Defaults to 0 if unspecified.
+          The default level required to send message events. Can be
+          overridden by the `events` key.  Defaults to 0 if unspecified.
         type: integer
       invite:
         description: The level required to invite a user. Defaults to 0 if unspecified.
@@ -70,8 +72,8 @@ properties:
         type: integer
       state_default:
         description: |-
-            The default level required to send state events. Can be overridden
-            by the `events` key. Defaults to 50 if unspecified.
+          The default level required to send state events. Can be overridden
+          by the `events` key. Defaults to 50 if unspecified.
         type: integer
       users:
         additionalProperties:
@@ -81,9 +83,9 @@ properties:
         type: object
       users_default:
         description: |-
-            The default power level for every user in the room, unless their
-            `user_id` is mentioned in the `users` key. Defaults to 0 if
-            unspecified.
+          The default power level for every user in the room, unless their
+          `user_id` is mentioned in the `users` key. Defaults to 0 if
+          unspecified.
         type: integer
       notifications:
         properties:
@@ -93,14 +95,14 @@ properties:
         additionalProperties:
           type: integer
         description: |-
-            The power level requirements for specific notification types.
-            This is a mapping from `key` to power level for that notifications key.
+          The power level requirements for specific notification types.
+          This is a mapping from `key` to power level for that notifications key.
         title: Notifications
         type: object
     type: object
   state_key:
     description: A zero-length string.
-    pattern: '^$'
+    pattern: "^$"
     type: string
   type:
     enum: