docs: update documentation

Author: theguild-bot

docs/README.md

@@ -1037,6 +1037,7 @@ The default error masking configuration for all subgraphs.
 |**error\_message**|`boolean`|Whether to redact the error message in subgraph errors. The default is `true`.<br/><br/>This field can be set to `false`, in order to disable error masking, by setting the `DISABLE_SUBGRAPH_ERROR_MASKING=true` environment variable.<br/>Default: `true`<br/>||
 |**extensions**||Whether to redact the `extensions` in errors.<br/><br/>You may pick the execution mode by setting `mode: allow` or `mode: deny`.<br/>Note: only root-level fields are supported.<br/>||
 
+**Additional Properties:** not allowed  
 **Example**
 
 ```yaml
@@ -1067,6 +1068,7 @@ Any configuration field that will be specified here, will override the configura
 |**error\_message**|`boolean`, `null`|Whether to redact the `error_message` in errors, for that specific subgraph.<br/><br/>Configuring this will override the global `all.error_message` setting.<br/>||
 |**extensions**||Whether to redact the `extensions` in errors, for that specific subgraph.<br/>Configuring this will override the global `all.extensions` setting.<br/><br/>You may pick the execution mode by setting `mode: allow` or `mode: deny`.<br/>Note: only root-level fields are supported.<br/>||
 
+**Additional Properties:** not allowed  
 **Example**
 
 ```yaml