fix: update client error schema to support schema errors (#467)

openapi.json

@@ -14,7 +14,7 @@
       "url": "http://www.apache.org/licenses/LICENSE-2.0"
     },
     "version": "2.0.0",
-    "x-box-commit-hash": "04f2210a1d"
+    "x-box-commit-hash": "6f736c0724"
   },
   "servers": [
     {
@@ -25676,14 +25676,8 @@
           "context_info": {
             "description": "A free-form object that contains additional context\nabout the error. The possible fields are defined on\na per-endpoint basis. `message` is only one example.",
             "type": "object",
-            "nullable": true,
-            "properties": {
-              "message": {
-                "description": "More details on the error.",
-                "type": "string",
-                "example": "Something went wrong."
-              }
-            }
+            "additionalProperties": true,
+            "nullable": true
           },
           "help_url": {
             "description": "A URL that links to more information about why this error occurred.",