detect arm through version and not platofrm (#343)

katrain/core/constants.py

@@ -1,5 +1,5 @@
 PROGRAM_NAME = "KaTrain"
-VERSION = "1.7.4"
+VERSION = "1.7.5"
 HOMEPAGE = "https://github.com/sanderland/katrain"
 CONFIG_MIN_VERSION = "1.7.0"  # keep config files from this version
 ANALYSIS_FORMAT_VERSION = "1.0"

katrain/core/engine.py

@@ -67,7 +67,7 @@ class KataGoEngine:
                     exe = "katrain/KataGo/katago"
                 else:
                     exe = find_package_resource("katrain/KataGo/katago-osx")  # github actions built
-                    if not os.path.isfile(exe) or "arm" in platform.machine():
+                    if not os.path.isfile(exe) or "arm64" in platform.version().lower():
                         exe = "katago"  # e.g. MacOS after brewing
 
             model = find_package_resource(config["model"])