Typo on deepseek.yaml and yi.yaml (#4170)

api/core/model_runtime/model_providers/deepseek/deepseek.yaml

@@ -33,7 +33,7 @@ provider_credential_schema:
     - variable: endpoint_url
       label:
         zh_Hans: 自定义 API endpoint 地址
-        en_US: CUstom API endpoint URL
+        en_US: Custom API endpoint URL
       type: text-input
       required: false
       placeholder:

api/core/model_runtime/model_providers/yi/yi.yaml

@@ -33,7 +33,7 @@ provider_credential_schema:
     - variable: endpoint_url
       label:
         zh_Hans: 自定义 API endpoint 地址
-        en_US: CUstom API endpoint URL
+        en_US: Custom API endpoint URL
       type: text-input
       required: false
       placeholder: