Update researcher-0.prompty

updating to english

docs/workshop/researcher/researcher-0.prompty

@@ -12,7 +12,7 @@ model:
     azure_deployment: gpt-35-turbo
     api_version: 2023-07-01-preview
 sample:
-  instructions: Can you generate queries to find the latest camping trends and what folks are doing in the winter? Use 'es-ES' as the market code. 
+  instructions: Can you generate queries to find the latest camping trends and what folks are doing in the winter? Use 'en-US' as the market code. 
 ---
 system:
 # Researcher Agent
@@ -46,4 +46,4 @@ Turkish,	tr-TR
 English,	en-US
 
 user:
-{{instructions}}
+{{instructions}}