doc: fix typo in graph guide

[ upstream commit b457a9b3a4027aa6b0e52940fbaf6736ad021296 ]

Fix typo in graph lib doc.

Fixes: 4dc6d8e ("doc: add graph library guide")

Signed-off-by: Ashwin Sekhar T K <asekhar@marvell.com>
Acked-by: Jerin Jacob <jerinj@marvell.com>

doc/guides/prog_guide/graph_lib.rst

@@ -173,7 +173,7 @@ Create the graph object
 ~~~~~~~~~~~~~~~~~~~~~~~
 Now that the nodes are linked, Its time to create a graph by including
 the required nodes. The application can provide a set of node patterns to
-form a graph object. The ``famish()`` API used underneath for the pattern
+form a graph object. The ``fnmatch()`` API used underneath for the pattern
 matching to include the required nodes. After the graph create any changes to
 nodes or graph is not allowed.