Update requirements.txt

python/requirements.txt

@@ -25,7 +25,7 @@ pytest==7.0.1
 prometheus-client==0.12.0
 pillow==8.4.0 ; python_version == "3.6"
 pillow==9.0.0 ; python_version > "3.6"
-av==8.0.3
-decord==0.4.2
-SimpleITK
+av==8.0.3; platform_machine !=  "aarch64"
+decord==0.4.2; platform_machine !=  "aarch64"
+SimpleITK; platform_machine !=  "aarch64"