Fix link

Author: MarkDaoust

site/en/tutorials/structured_data/imbalanced_data.ipynb

@@ -478,7 +478,7 @@
         "\n",
         "\n",
         "#### Read more:\n",
-        "*   [Strictly Proper Scoring Rules, Prediction, and Estimation](www.stat.washington.edu/people/raftery/Research/PDF/Gneiting2007jasa.pdf)\n",
+        "*   [Strictly Proper Scoring Rules, Prediction, and Estimation](https://www.stat.washington.edu/people/raftery/Research/PDF/Gneiting2007jasa.pdf)\n",
         "*   [True vs. False and Positive vs. Negative](https://developers.google.com/machine-learning/crash-course/classification/true-false-positive-negative)\n",
         "*   [Accuracy](https://developers.google.com/machine-learning/crash-course/classification/accuracy)\n",
         "*   [Precision and Recall](https://developers.google.com/machine-learning/crash-course/classification/precision-and-recall)\n",