[dendrite] Upgrade app version and change default value to Github Containers (#1743)

* [dendrite] Upgrade Dendrite to 0.9.2

* [dendrite] Change default repository

It was Docker Hub, now it's Github Containers.

* [dendrite]: appversion to 0.9.3.

Co-authored-by: Winston R. Milling <Winston@Milli.ng>

* [dendrite]: Update the description of change.

Co-authored-by: Winston R. Milling <Winston@Milli.ng>

Co-authored-by: Winston R. Milling <Winston@Milli.ng>

charts/incubator/dendrite/Chart.yaml

@@ -1,9 +1,9 @@
 ---
 apiVersion: v2
-appVersion: v0.9.1
+appVersion: v0.9.3
 description: Dendrite Matrix Homeserver
 name: dendrite
-version: 6.2.0
+version: 6.3.0
 kubeVersion: ">=1.16.0-0"
 keywords:
   - dendrite
@@ -81,9 +81,7 @@ dependencies:
     condition: dendrite.polylithEnabled
 annotations:
   artifacthub.io/changes: |-
-    - kind: added
-      description: Configuration options for in-memory cache
-    - kind: added
-      description: Configuration option for .well-known/matrix/client
     - kind: changed
-      description: Upgraded dendrite to 0.9.1
+      description: Changed the default dendrite image repo to use from Docker Hub to Github Containers.
+    - kind: changed
+      description: Upgraded dendrite to 0.9.3

charts/incubator/dendrite/values.yaml

@@ -8,7 +8,7 @@
 ---
 image:
   # -- image repository
-  repository: matrixdotorg/dendrite-monolith
+  repository: ghcr.io/matrix-org/dendrite-monolith
   # -- image tag
   # @default -- chart.appVersion
   tag: