Add NEWS entry for r75180.
diff --git a/Misc/NEWS b/Misc/NEWS
index 13912e9..50cf4d7 100644
--- a/Misc/NEWS
+++ b/Misc/NEWS
@@ -390,6 +390,8 @@
 Library
 -------
 
+- Issue #7031: Add TestCase.assert(Not)IsInstance() methods.
+
 - Issue #6790: Make it possible again to pass an `array.array` to
   `httplib.HTTPConnection.send`. Patch by Kirk McDonald.