Fix GPUHLSOutput method name (write not write_frame)

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

streaming/gpu_output.py

@@ -276,7 +276,7 @@ class GPUHLSOutput:
             stderr=subprocess.DEVNULL,
         )
 
-    def write_frame(self, frame: Union[np.ndarray, 'cp.ndarray'], t: float = 0):
+    def write(self, frame: Union[np.ndarray, 'cp.ndarray'], t: float = 0):
         """Write a frame using GPU encoding."""
         if not self._is_open:
             return