patch 8.2.0010: test64 is old style

Problem:    Test64 is old style.
Solution:   Convert to new style test. (Yegappan Lakshmanan, closes #5363)
diff --git a/src/testdir/test95.in b/src/testdir/test95.in
index 934afde..5422137 100644
--- a/src/testdir/test95.in
+++ b/src/testdir/test95.in
@@ -1,5 +1,5 @@
 Test for regexp patterns with multi-byte support, using utf-8.
-See test64 for the non-multi-byte tests.
+See test_regexp_latin.vim for the non-multi-byte tests.
 
 A pattern that gives the expected result produces OK, so that we know it was
 actually tried.