Fix broken grafana.ini rebase from previous commit

The last hunk which I applied manually incorrectly retained its pluses.

Fixes: 825a0c92 ("grafana: rebase grafana.ini to grafana 10.2.0-1")

roles/grafana/templates/grafana.ini.j2

@@ -1577,13 +1577,13 @@ mode = syslog
 ################################## Feature Management ##############################################
 [feature_management]
 # Options to configure the experimental Feature Toggle Admin Page feature, which is behind the `featureToggleAdminPage` feature toggle. Use at your own risk.
-+# Allow editing of feature toggles in the feature management page
-+;allow_editing = false
-+# Allow customization of URL for the controller that manages feature toggles
-+;update_webhook =
-+# Allow configuring an auth token for feature management update requests
-+;update_webhook_token =
-+# Hide specific feature toggles from the feature management page
-+;hidden_toggles =
-+# Disable updating specific feature toggles in the feature management page
-+;read_only_toggles =
+# Allow editing of feature toggles in the feature management page
+;allow_editing = false
+# Allow customization of URL for the controller that manages feature toggles
+;update_webhook =
+# Allow configuring an auth token for feature management update requests
+;update_webhook_token =
+# Hide specific feature toggles from the feature management page
+;hidden_toggles =
+# Disable updating specific feature toggles in the feature management page
+;read_only_toggles =