Document shared PP-OCRv5 mobile det/cls/rec in manifest

manifest.json

@@ -88,5 +88,15 @@
     "rec_bin_bytes": 38293100,
     "keys_lines": 18710,
     "source": "https://github.com/Avafly/PaddleOCR-ncnn-CPP/releases/download/v0.3.0/archive.tar.gz"
+  },
+  "shared_v5_mobile": {
+    "det_param_bytes": 23816,
+    "det_bin_bytes": 2357216,
+    "cls_param_bytes": 6987,
+    "cls_bin_bytes": 486108,
+    "rec_param_bytes": 19242,
+    "rec_bin_bytes": 8242276,
+    "keys_lines": 18385,
+    "source": "https://github.com/Avafly/PaddleOCR-ncnn-CPP/releases/download/v0.3.0/archive.tar.gz"
   }
-}
+}