Update expected_doxygen_warnings.txt

Author: SaswatPadhi

scripts/expected_doxygen_warnings.txt

@@ -26,7 +26,7 @@ warning: Included by graph for 'c_types.h' not generated, too many nodes (144),
 warning: Included by graph for 'config.h' not generated, too many nodes (77), threshold is 60. Consider increasing DOT_GRAPH_MAX_NODES.
 warning: Included by graph for 'exception_utils.h' not generated, too many nodes (61), threshold is 60. Consider increasing DOT_GRAPH_MAX_NODES.
 warning: Included by graph for 'expr.h' not generated, too many nodes (87), threshold is 60. Consider increasing DOT_GRAPH_MAX_NODES.
-warning: Included by graph for 'expr_util.h' not generated, too many nodes (61), threshold is 60. Consider increasing DOT_GRAPH_MAX_NODES.
+warning: Included by graph for 'expr_util.h' not generated, too many nodes (62), threshold is 60. Consider increasing DOT_GRAPH_MAX_NODES.
 warning: Included by graph for 'invariant.h' not generated, too many nodes (186), threshold is 60. Consider increasing DOT_GRAPH_MAX_NODES.
 warning: Included by graph for 'irep.h' not generated, too many nodes (62), threshold is 60. Consider increasing DOT_GRAPH_MAX_NODES.
 warning: Included by graph for 'message.h' not generated, too many nodes (118), threshold is 60. Consider increasing DOT_GRAPH_MAX_NODES.