Fix test header

Author: tstellar

.ci/generate_test_report_github.py

@@ -17,7 +17,12 @@
     args = parser.parse_args()
 
     logo = ":window:" if platform.system() == "Windows" else ":penguin:"
-    platform_title = f"{logo} {platform.system()} {platform.machine()} Test Results"
+    # On Linux the machine value is x86_64 on Windows it is AMD64.
+    if platform.machine() == 'x86_64' or platform.machine() == "AMD64":
+        arch = "x64"
+    else:
+        arch = platform.machine()
+    platform_title = f"{logo} {platform.system()} {arch} Test Results"
     report = generate_test_report_lib.generate_report_from_files(
         platform_title, args.return_code, args.build_test_logs
     )