bulma: Upgrade to Bulma 0.9.4

Signed-off-by: Michael Tremer <michael.tremer@ipfire.org>

diff --git a/src/third-party/bulma b/src/third-party/bulma
index 3e00a8e6d0d0e566d507328f0185ef84854effba..16f1b768818af9cfc217e8112ad38b14afc46a44 160000 (submodule)
--- a/src/third-party/bulma
+++ b/src/third-party/bulma
@@ -1 +1 @@
-Subproject commit 3e00a8e6d0d0e566d507328f0185ef84854effba
+Subproject commit 16f1b768818af9cfc217e8112ad38b14afc46a44