saddle-points: directions seem mixed up

[ee7]

Follow-up from #2248 (comment).

We write:

problem-specifications/exercises/saddle-points/instructions.md

Line 8 in ad4a54b

An acceptable tree will be the the largest in its row, while being the smallest in its column.

problem-specifications/exercises/saddle-points/introduction.md

Line 8 in ad4a54b

The best tree will be the tallest tree compared to all the other trees to the east and west, so that you have the best possible view of the sunrises and sunsets.

problem-specifications/exercises/saddle-points/canonical-data.json

Lines 16 to 27 in ad4a54b

	"matrix": [
	[9, 8, 7],
	[5, 3, 2],
	[6, 6, 7]
	]
	},
	"expected": [
	{
	"row": 2,
	"column": 1
	}
	]

And therefore the below should say that "rows represent the east-west direction", right?

problem-specifications/exercises/saddle-points/instructions.md

Line 6 in ad4a54b

The rows of the grid represent the north-south direction, and the columns represent the east-west direction.