fix: modify default package for go handler ext-fix-serverless-functions (#5816)

Author: andreasduerloo

pages/serverless-functions/how-to/package-function-dependencies-in-zip.mdx

@@ -194,7 +194,7 @@ The example above will create a `.zip` archive that contains the myFunction fold
         - For the file `handler.go` at the root of the project → `Handle`.
 
       <Message type="note">
-        By default, the handler path is `Handle` (package main at the root of the archive).
+        By default, the handler path is `Handle` (package handler at the root of the archive).
       </Message>
   </TabsTab>
   <TabsTab label="PHP">