http: update to example.com

And also fix a minor typo

pages/linux/httpie.md

@@ -4,28 +4,28 @@
 
 - Send a GET request (default method with no request data):
 
-`http {{https://api.github.com/users}}`
+`http {{https://example.com}}`
 
 - Send a POST request (default method with request data):
 
-`http {{example.org}} {{hello=World}}`
+`http {{https://example.com}} {{hello=World}}`
 
 - Send a POST request with redirected input:
 
-`http {{example.org}} < {{file.json}}`
+`http {{https://example.com}} < {{file.json}}`
 
 - Send a PUT request with a given json body:
 
-`http PUT {{httpbin.org/put}} {{hello=world}}`
+`http PUT {{https://example.com/todos/7}} {{hello=world}}`
 
-- Send a DELETE request with a giben header:
+- Send a DELETE request with a given request header:
 
-`http DELETE {{example.org/todos/7}} {{API-Key:foo}}`
+`http DELETE {{https://example.com/todos/7}} {{API-Key:foo}}`
 
 - Show the whole HTTP exchange (both request and response):
 
-`http -v {{example.org}}`
+`http -v {{https://example.com}}`
 
 - Download a file:
 
-`http --download {{example.org}}`
+`http --download {{https://example.com}}`