t1092: mark passing test as success

This test passes in the microsoft/git fork, so mark it as such. Leave
the comment as a TODO so we can find which commit makes it pass and
see if that should be upstreamed.

Signed-off-by: Derrick Stolee <dstolee@microsoft.com>

t/t1092-sparse-checkout-compatibility.sh

@@ -308,9 +308,8 @@ test_expect_failure 'blame with pathspec outside sparse definition' '
 	test_all_match git blame deep/deeper2/deepest/a
 '
 
-# TODO: reset currently does not behave as expected when in a
-# sparse-checkout.
-test_expect_failure 'checkout and reset (mixed)' '
+# TODO: This behaves correctly in microsoft/git. Why?
+test_expect_success 'checkout and reset (mixed)' '
 	init_repos &&
 
 	test_all_match git checkout -b reset-test update-deep &&