Update docs/source/metrics.rst

Co-authored-by: YunLiu <[email protected]>
Signed-off-by: Thibault de Varax <[email protected]>

Author: thibaultdvx

docs/source/metrics.rst

@@ -81,7 +81,7 @@ Metrics
     :members:
 
 `Average Precision`
---------------------------
+-------------------
 .. autofunction:: compute_average_precision
 
 .. autoclass:: AveragePrecisionMetric