fix: flag ambassador chart as deprecated (#22489)

Signed-off-by: Markus Maga <markus@maga.se>

stable/ambassador/Chart.yaml

@@ -1,8 +1,12 @@
+# This version of the ambassador helm chart is deprecated.
+# All future updates should be instead made to the datawire-hosted Helm chart,
+# located at https://github.com/datawire/ambassador-chart.
 apiVersion: v1
 appVersion: 0.86.1
-description: A Helm chart for Datawire Ambassador
+description: DEPRECATED A Helm chart for Datawire Ambassador
 name: ambassador
-version: 5.3.1
+version: 5.3.2
+deprecated: true
 icon: https://www.getambassador.io/images/logo.png
 home: https://www.getambassador.io/
 sources:
@@ -13,13 +17,4 @@ keywords:
   - ambassador
   - datawire
   - envoy
-maintainers:
-  - name: flydiverny
-    email: markus@maga.se
-  - name: kflynn
-    email: flynn@datawire.io
-  - name: nbkrause
-    email: nkrause@datawire.io
-  - name: lukeshu
-    email: lukeshu@datawire.io
 engine: gotpl

stable/ambassador/templates/NOTES.txt

@@ -1,3 +1,6 @@
+DEPRECATED!! This version of the chart has been deprecated.
+Please use https://github.com/datawire/ambassador-chart
+
 Congratulations! You've successfully installed Ambassador.
 
 For help, visit our Slack at https://d6e.co/slack or view the documentation online at https://www.getambassador.io.