Update metrics-family.rst

Author: Saloni-2005

doc/metrics/metrics-family.rst

@@ -33,13 +33,16 @@ Metrics - Family of functions
 * :doc:`pgr_betweennessCentrality` - Calculates relative betweenness centrality
   using Brandes Algorithm
 
+* :doc:`pgr_bandwidth` - Computes the bandwidth of a graph.
+
 .. experimental-end
 
 .. toctree::
     :hidden:
 
     pgr_degree
     pgr_betweennessCentrality
+    pgr_bandwidth
 
 See Also
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