Update themes submodule.

simonbrowndotje · simonbrowndotje · commit d40e63572c38 · 2025-04-29T13:40:57.000+02:00
diff --git a/structurizr-onpremises/src/main/webapp/static/themes b/structurizr-onpremises/src/main/webapp/static/themes
@@ -1 +1 @@
-Subproject commit 2378affc74f29baa1d24410af36ce43a4cc984f1
+Subproject commit a4be0d28f16d0d8eca4bc8037750549a4dfe3d47
