fix: "open in explorer" opens correct folder (#603)

* replaced as_posix with str

* replaced addition with f string

---------

Co-authored-by: Travis Abendshien <46939827+CyanVoxel@users.noreply.github.com>

Author: KirilBourakov

tagstudio/src/qt/helpers/file_opener.py

@@ -31,10 +31,11 @@ def open_file(path: str | Path, file_manager: bool = False):
 
     try:
         if sys.platform == "win32":
-            normpath = Path(path).resolve().as_posix()
+            normpath = str(Path(path).resolve())
             if file_manager:
                 command_name = "explorer"
-                command_arg = '/select,"' + normpath + '"'
+                command_arg = f'/select,"{normpath}"'
+
                 # For some reason, if the args are passed in a list, this will error when the
                 # path has spaces, even while surrounded in double quotes.
                 subprocess.Popen(