Use local app data for cache on windows

APPDATA env variable resolves to the Roaming appdata directory which is
meant to be synced to other machines. Instead use the LOCALAPPDATA which
resolves to the Local appdata directory meant for temporary cache files.

Additionally, the 'cache' subdirectory does not seem to be required.

twitchdl/cache.py

@@ -45,8 +45,8 @@ def _cache_dir_path() -> Path:
     """Returns the path to the cache directory"""
 
     # Windows
-    if sys.platform == "win32" and "APPDATA" in os.environ:
-        return Path(os.environ["APPDATA"], CACHE_SUBFOLDER, "cache")
+    if sys.platform == "win32" and "LOCALAPPDATA" in os.environ:
+        return Path(os.environ["LOCALAPPDATA"], CACHE_SUBFOLDER)
 
     # Mac OS
     if sys.platform == "darwin":