Adjust changelog for 64bit nonzeros.

diff --git a/doc/news/changes/incompatibilities/20220404Fehling b/doc/news/changes/incompatibilities/20220404Fehling
index 3dcfb29ad4856aa8a2bfc848d27ee2cf7ba61422..841d8aba7ff14d7a692e29f51c6af13236ec0210 100644 (file)
--- a/doc/news/changes/incompatibilities/20220404Fehling
+++ b/doc/news/changes/incompatibilities/20220404Fehling
@@ -1,5 +1,6 @@
 Changed: All functions `n_nonzero_elements()`, which are members of the
-SparseMatrix and SparsityPattern family of classes, now always return
-`std::uint64_t` instead of types::global_dof_index.
+SparseMatrix and SparsityPattern family of classes from PETSc and
+Trilinos, now always return `std::uint64_t` instead of
+types::global_dof_index.
 <br>
 (Marc Fehling, 2022/04/04)