Correct capitalisation of GitHub

Co-authored-by: Hugo van Kemenade <1324225+hugovk@users.noreply.github.com>

Author: freakboy3742

Lib/test/test_socketserver.py

@@ -224,15 +224,15 @@ def test_ForkingUDPServer(self):
 
     @requires_unix_sockets
     @unittest.skipIf(test.support.is_apple_mobile and test.support.on_github_actions,
-                     "gh-140702: Test fails regularly on iOS simulator on Github Actions")
+                     "gh-140702: Test fails regularly on iOS simulator on GitHub Actions")
     def test_UnixDatagramServer(self):
         self.run_server(socketserver.UnixDatagramServer,
                         socketserver.DatagramRequestHandler,
                         self.dgram_examine)
 
     @requires_unix_sockets
     @unittest.skipIf(test.support.is_apple_mobile and test.support.on_github_actions,
-                     "gh-140702: Test fails regularly on iOS simulator on Github Actions")
+                     "gh-140702: Test fails regularly on iOS simulator on GitHub Actions")
     def test_ThreadingUnixDatagramServer(self):
         self.run_server(socketserver.ThreadingUnixDatagramServer,
                         socketserver.DatagramRequestHandler,