upgrade deepseek params (#6215)

api/core/model_runtime/model_providers/deepseek/llm/deepseek-chat.yaml

@@ -7,7 +7,7 @@ features:
   - agent-thought
 model_properties:
   mode: chat
-  context_size: 32000
+  context_size: 128000
 parameter_rules:
   - name: temperature
     use_template: temperature

api/core/model_runtime/model_providers/deepseek/llm/deepseek-coder.yaml

@@ -7,7 +7,7 @@ features:
   - agent-thought
 model_properties:
   mode: chat
-  context_size: 32000
+  context_size: 128000
 parameter_rules:
   - name: temperature
     use_template: temperature