[dvsim] Bug fix in LintCfg.py

- `results_page` referenced on line 226 needs to be qualified with
`self`

Signed-off-by: Srikrishna Iyer <sriyer@google.com>
diff --git a/util/dvsim/LintCfg.py b/util/dvsim/LintCfg.py
index f28e14f..ae26252 100644
--- a/util/dvsim/LintCfg.py
+++ b/util/dvsim/LintCfg.py
@@ -223,5 +223,5 @@
         with open(self.results_file, 'w') as f:
             f.write(self.results_md)
 
-        log.info("[results page]: [%s] [%s]", self.name, results_file)
+        log.info("[results page]: [%s] [%s]", self.name, self.results_file)
         return self.results_md