[SourceEditor] Update icons

Follow-up-to: 2954eef8297b45af21366f63d2b70e4d70a675e4
diff --git a/ltk/org.eclipse.statet.ltk.ui/icons/obj_16/text-template.png b/ltk/org.eclipse.statet.ltk.ui/icons/obj_16/text-template.png
index 5447e32..9eb6295 100644
--- a/ltk/org.eclipse.statet.ltk.ui/icons/obj_16/text-template.png
+++ b/ltk/org.eclipse.statet.ltk.ui/icons/obj_16/text-template.png
Binary files differ
diff --git a/ltk/org.eclipse.statet.ltk.ui/icons/obj_16/text-template@2x.png b/ltk/org.eclipse.statet.ltk.ui/icons/obj_16/text-template@2x.png
index fc569d0..ff00c65 100644
--- a/ltk/org.eclipse.statet.ltk.ui/icons/obj_16/text-template@2x.png
+++ b/ltk/org.eclipse.statet.ltk.ui/icons/obj_16/text-template@2x.png
Binary files differ