Note about INSTANTIATE_TEST_SUITE_P / INSTANTIATE_TEST_CASE_P  keyword change

See https://github.com/google/googletest/issues/2065
diff --git a/googletest/docs/advanced.md b/googletest/docs/advanced.md
index ea9b80f..c2438de 100644
--- a/googletest/docs/advanced.md
+++ b/googletest/docs/advanced.md
@@ -1396,6 +1396,8 @@
 
 For more details, see the comments at the definitions of these functions.
 
+NOTE: The `INSTANTIATE_TEST_SUITE_P` keyword is only valid since 1.8.1. For previous releases the keyword is `INSTANTIATE_TEST_CASE_P`. More generally, please refer to the documentation matching your release version.
+
 The following statement will instantiate tests from the `FooTest` test suite each
 with parameter values `"meeny"`, `"miny"`, and `"moe"`.