Fixes linting for branding and adds back old config name for bwc

Signed-off-by: Bishoy Boktor <boktorbb@amazon.com>

Author: Bishoy Boktor

config/opensearch_dashboards.yml

@@ -85,6 +85,11 @@
 # For reference, the `threshold of memoryCircuitBreaker` = `max-old-space-size of NodeJS` * `opensearch.memoryCircuitBreaker.maxPercentage`
 #opensearch.memoryCircuitBreaker.maxPercentage: 1.0
 
+# DEPRECATED: Use opensearch.requestHeadersAllowlist
+# List of OpenSearch Dashboards client-side headers to send to OpenSearch. To send *no* client-side
+# headers, set this value to [] (an empty list).
+#opensearch.requestHeadersWhitelist: [ authorization ]
+
 # List of OpenSearch Dashboards client-side headers to send to OpenSearch. To send *no* client-side
 # headers, set this value to [] (an empty list).
 #opensearch.requestHeadersAllowlist: [ authorization ]
@@ -159,17 +164,17 @@
 #vis_type_timeline.graphiteBlockedIPs: []
 
 # opensearchDashboards.branding:
-# logo:
-# defaultUrl: ""
-# darkModeUrl: ""
-# mark:
-# defaultUrl: ""
-# darkModeUrl: ""
-# loadingLogo:
-# defaultUrl: ""
-# darkModeUrl: ""
-# faviconUrl: ""
-# applicationTitle: ""
+#   logo:
+#     defaultUrl: ""
+#     darkModeUrl: ""
+#   mark:
+#     defaultUrl: ""
+#     darkModeUrl: ""
+#   loadingLogo:
+#     defaultUrl: ""
+#     darkModeUrl: ""
+#   faviconUrl: ""
+#   applicationTitle: ""
 
 # Set the value of this setting to true to capture region blocked warnings and errors
 # for your map rendering services.