Fix some wording to comply with respectful-code

https: //source.android.com/setup/contribute/respectful-code
Test: Run unit tests
Bug: 161896447
Change-Id: I9a3676b6f7bb6be43756fdf18b1d8b9ec41fb4cf
diff --git a/tools/releasetools/test_verity_utils.py b/tools/releasetools/test_verity_utils.py
index d02bc7f..cfc4942 100644
--- a/tools/releasetools/test_verity_utils.py
+++ b/tools/releasetools/test_verity_utils.py
@@ -234,7 +234,7 @@
 
   @SkipIfExternalToolsUnavailable()
   def test_Build_SanityCheck(self):
-    # A sanity check for the test itself: the image shouldn't be verifiable
+    # A validity check for the test itself: the image shouldn't be verifiable
     # with wrong key.
     self.assertRaises(
         common.ExternalError,