fix play command for files

setup.cfg

@@ -1,6 +1,6 @@
 [metadata]
 name = jimaku-dl
-version = 0.1.2
+version = 0.1.3
 author = InsaneDesperado
 author_email = insane@lmaoxd.lol
 description = Download japanese anime subtitles from Jimaku

src/jimaku_dl/downloader.py

@@ -766,8 +766,7 @@ class JimakuDownloader:
         if play and not is_directory:
             self.logger.info("Launching MPV with the subtitle files...")
             mpv_cmd = ["mpv", media_file]
-            for sub in downloaded_files:
-                mpv_cmd.extend(["--sub-file", sub])
+            mpv_cmd.extend([f"--sub-file={filename}"])
             try:
                 self.logger.debug(f"Running command: {' '.join(mpv_cmd)}")
                 subprocess_run(mpv_cmd)