Rename a variable to avoid spurious pylint failure

pylint flagged `graph` (used earlier in a function) as a redefinition
of a name from outer scope. This happens because the block under the
`if __name__ == "__main__"` check is technically in module scope.
Therefore, at analysis-time, there is a module-scoped variable named
`graph` and we "need" to avoid redefinition.

This could be tucked into a `def _main()` to "hide" the name from
module scope, but a rename is equally simple to dodge the
overly-aggressive pylint check.

src/globus_sdk/experimental/scope_parser/parser.py

@@ -260,9 +260,9 @@ def parse_scope_graph(scopes: str) -> ScopeGraph:
 if __name__ == "__main__":
     import sys
 
-    graph = parse_scope_graph(sys.argv[1])
+    parsed_graph = parse_scope_graph(sys.argv[1])
     print(
         "top level scopes:",
-        ", ".join([name for name, _optional in graph.top_level_scopes]),
+        ", ".join([name for name, _optional in parsed_graph.top_level_scopes]),
     )
-    print(graph)
+    print(parsed_graph)