chore: improve llm instructions

Author: derogab

src/index.ts

@@ -35,7 +35,7 @@ export default {
             { role: "system", content: "You are an assistant with only one task." },
             { role: "system", content: "The task: find the caller's phone number from a voicemail email." },
             { role: "system", content: "You will receive the voicemail as unique input." },
-            { role: "system", content: "Be careful not to confuse the caller's phone number with the number of the called party." },
+            { role: "system", content: "Be careful not to confuse the caller's phone number with the called one." },
             { role: "system", content: "You MUST reply with only the caller number." },
             { role: "user", content: emailSubject },
           ],