[MINOR] [MLLIB] [ML] [DOC] fixed typo: label for negative result should be 0.0 (original: 1.0)

Small typo in the example for `LabelledPoint` in the MLLib docs.

Author: Sean Paradiso <seanparadiso@gmail.com>

Closes #8680 from sparadiso/docs_mllib_smalltypo.

(cherry picked from commit 1dc7548c598c4eb4ecc7d5bb8962a735bbd2c0f7)
Signed-off-by: Xiangrui Meng <meng@databricks.com>
diff --git a/docs/mllib-data-types.md b/docs/mllib-data-types.md
index 101dc2f..70b5e76 100644
--- a/docs/mllib-data-types.md
+++ b/docs/mllib-data-types.md
@@ -144,7 +144,7 @@
 LabeledPoint pos = new LabeledPoint(1.0, Vectors.dense(1.0, 0.0, 3.0));
 
 // Create a labeled point with a negative label and a sparse feature vector.
-LabeledPoint neg = new LabeledPoint(1.0, Vectors.sparse(3, new int[] {0, 2}, new double[] {1.0, 3.0}));
+LabeledPoint neg = new LabeledPoint(0.0, Vectors.sparse(3, new int[] {0, 2}, new double[] {1.0, 3.0}));
 {% endhighlight %}
 </div>