fix(stack/observability): Change tempo port: 3100 -> 3200

Changed in chart 1.21.1:

> Breaking Change * In order to be consistent with other projects and documentations, the default port has been changed from 3100 to 3200.

Author: NickLarsenNZ

stacks/observability/grafana.yaml

@@ -37,7 +37,7 @@ options:
             tlsAuthWithCACert: false
         - name: Tempo
           type: tempo
-          url: http://tempo:3100
+          url: http://tempo:3200
           access: proxy
           isDefault: false
           jsonData: