Update prims_minimum_spanning.py

function name changed

Author: Himanshu-77

algorithms/graph/prims_minimum_spanning.py

@@ -18,7 +18,7 @@
 import heapq  # for priority queue
 
 # prim's algo. to find weight of minimum spanning tree
-def prims(graph_used):
+def prims_minimum_spanning(graph_used):
     vis=[]
     s=[[0,1]]
     prim = []