message: fix typo and reference
diff: @@ -38,13 +38,13 @@ best matches. There is also **cv.drawMatchesKnn** which draws all the k best mat
  will draw two match-lines for each keypoint. So we have to pass a mask if we want to selectively
  draw it.
  -Let's see one example for each of SURF and ORB (Both use different distance measurements).
  +Let's see one example for each of SIFT and ORB (Both use different distance measurements).
  ### Brute-Force Matching with ORB Descriptors
  Here, we will see a simple example on how to match features between two images. In this case, I have
  a queryImage and a trainImage. We will try to find the queryImage in trainImage using feature
  -matching. ( The images are /samples/c/box.png and /samples/c/box_in_scene.png)
  +matching. ( The images are /samples/data/box.png and /samples/data/box_in_scene.png)
  We are using ORB descriptors to match features. So let's start with loading images, finding
  descriptors etc.
  