Fix doc (#661)

Author: mthrok

docs/source/plots/streaming_video_processing_chart.txt

@@ -1,13 +1,13 @@
 .. mermaid::
 
    flowchart TD
-       In[Input Video] -->|1. Demux| AP(Audio Packets)
-       AP --> |2. Remux| Out[Output Video]
-       In[Input Video] -->|1. Demux| VP(Video Packets)
-       VP --> |3. Decode| VF("Video Frames (YUV)")
-       VF --> |4. Filter| VF2("Video Frames (RGB)")
-       VF2 --> |5. Convert| ARR(Array)
-       ARR --> |6. Wrap| VF3("Video Frames (RGB)")
-       VF3 --> |7. Filter| VF4("Video Frames (YUV)")
-       VF4 --> |8. Encode| VP2(Video Packets)
-       VP2 --> |9. Mux| Out
+       In[Input Video] -->|1\. Demux| AP(Audio Packets)
+       AP --> |2\. Remux| Out[Output Video]
+       In[Input Video] -->|1\. Demux| VP(Video Packets)
+       VP --> |3\. Decode| VF("Video Frames (YUV)")
+       VF --> |4\. Filter| VF2("Video Frames (RGB)")
+       VF2 --> |5\. Convert| ARR(Array)
+       ARR --> |6\. Wrap| VF3("Video Frames (RGB)")
+       VF3 --> |7\. Filter| VF4("Video Frames (YUV)")
+       VF4 --> |8\. Encode| VP2(Video Packets)
+       VP2 --> |9\. Mux| Out