add links to model weights in age prediction tutorial

Author: x4nth055

Diff for: machine-learning/face-age-prediction/README.md

@@ -1,7 +1,7 @@
 # [Age Prediction using OpenCV in Python](https://www.thepythoncode.com/article/predict-age-using-opencv)
 Before running the code, do the following:
 - `pip3 install -r requirements.txt`
-- Download [face detection] and [age detection] models and put them in the `weights` folder.
+- Download [face detection](https://raw.githubusercontent.com/opencv/opencv_3rdparty/dnn_samples_face_detector_20180205_fp16/res10_300x300_ssd_iter_140000_fp16.caffemodel) and [age detection](https://drive.google.com/open?id=1kiusFljZc9QfcIYdU2s7xrtWHTraHwmW) models and put them in the `weights` folder.
 - Run the program:
     ```
     python predict_age.py 3-people.jpg