Merge pull request #24519 from shubh1176:4.x

updated additional resources links

doc/py_tutorials/py_ml/py_knn/py_knn_understanding/py_knn_understanding.markdown

@@ -141,7 +141,7 @@ Additional Resources
 --------------------
 
 1.  [NPTEL notes on Pattern Recognition, Chapter
-    11](https://nptel.ac.in/courses/106/108/106108057/)
+    11](https://nptel.ac.in/courses/106108057)
 2.  [Wikipedia article on Nearest neighbor search](https://en.wikipedia.org/wiki/Nearest_neighbor_search)
 3.  [Wikipedia article on k-d tree](https://en.wikipedia.org/wiki/K-d_tree)
 

doc/py_tutorials/py_ml/py_svm/py_svm_basics/py_svm_basics.markdown

@@ -129,7 +129,6 @@ Additional Resources
 --------------------
 
 -#  [NPTEL notes on Statistical Pattern Recognition, Chapters
-    25-29](http://www.nptel.ac.in/courses/106108057/26).
-
+    25-29](https://nptel.ac.in/courses/117108048)
 Exercises
 ---------