fix: Set NotoSans-Regular as mainfont

src/format/preamble.tex

@@ -1,7 +1,7 @@
 \documentclass{article}
 \usepackage[a4paper,left=1cm,right=1cm,top=1cm,bottom=1cm]{geometry}
 \usepackage{fontspec}
-\setmainfont{Ubuntu}
+\setmainfont{NotoSans-Regular}
 \usepackage{supertabular}
 \usepackage{array}