docs(v1.8.3): update markdown docs (#182)

Co-authored-by: GitHub Bot <cicd@getstream.io>

Author: yaziine

docs/stream-cli_chat.md

@@ -77,6 +77,5 @@ Allows you to interact with your Chat applications
 * [stream-cli chat upload-import](stream-cli_chat_upload-import.md)	 - Upload an import
 * [stream-cli chat upsert-pushprovider](stream-cli_chat_upsert-pushprovider.md)	 - Create or updates a push provider
 * [stream-cli chat upsert-user](stream-cli_chat_upsert-user.md)	 - Upsert a user
-* [stream-cli chat validate-import](stream-cli_chat_validate-import.md)	 - Validate import file
 * [stream-cli chat watch](stream-cli_chat_watch.md)	 - Wait for an async task to complete
 

docs/stream-cli_chat_delete-user.md

@@ -20,9 +20,10 @@ $ stream-cli chat upload-import data.json --mode insert --output-format tree
 ### Options
 
 ```
-  -h, --help                   help for upload-import
-  -m, --mode string            [optional] Import mode. Canbe upsert or insert (default "upsert")
-  -o, --output-format string   [optional] Output format. Can be json or tree (default "json")
+  -h, --help                    help for upload-import
+      --lighter-validation-id   [optional] allows to pass ! in channel ID
+  -m, --mode string             [optional] Import mode. Canbe upsert or insert (default "upsert")
+  -o, --output-format string    [optional] Output format. Can be json or tree (default "json")
 ```
 
 ### Options inherited from parent commands

docs/stream-cli_chat_upload-import.md

@@ -14,7 +14,7 @@ Create or updates a push provider
 			description
 			disabled_at
 			disabled_reason
-					
+
 			apn_auth_key
 			apn_key_id
 			apn_team_id
@@ -23,10 +23,10 @@ Create or updates a push provider
 			firebase_notification_template
 			firebase_apn_template
 			firebase_credentials
-					
+
 			huawei_app_id
 			huawei_app_secret
-					
+
 			xiaomi_package_name
 			xiaomi_app_secret