Fix `--source 'path/*.jpg'` glob example (#8927)

.github/README_cn.md

@@ -102,7 +102,7 @@ python detect.py --source 0  # 网络摄像头
                           img.jpg  # 图像
                           vid.mp4  # 视频
                           path/  # 文件夹
-                          path/*.jpg  # glob
+                          'path/*.jpg'  # glob
                           'https://youtu.be/Zgi9g1ksQHc'  # YouTube
                           'rtsp://example.com/media.mp4'  # RTSP, RTMP, HTTP 流
 ```

README.md

@@ -108,7 +108,7 @@ python detect.py --source 0  # webcam
                           img.jpg  # image
                           vid.mp4  # video
                           path/  # directory
-                          path/*.jpg  # glob
+                          'path/*.jpg'  # glob
                           'https://youtu.be/Zgi9g1ksQHc'  # YouTube
                           'rtsp://example.com/media.mp4'  # RTSP, RTMP, HTTP stream
 ```

tutorial.ipynb

@@ -448,7 +448,7 @@
         "                          img.jpg  # image \n",
         "                          vid.mp4  # video\n",
         "                          path/  # directory\n",
-        "                          path/*.jpg  # glob\n",
+        "                          'path/*.jpg'  # glob\n",
         "                          'https://youtu.be/Zgi9g1ksQHc'  # YouTube\n",
         "                          'rtsp://example.com/media.mp4'  # RTSP, RTMP, HTTP stream\n",
         "```"