fix: replace bibliography backend with biber

packages.tex

@@ -23,7 +23,7 @@
 \usepackage{listings}	%TODO: unused atm (remove?)
 
 % --- Bibliography ---
-\usepackage[backend=bibtex, sorting=none]{biblatex}
+\usepackage[sorting=none]{biblatex}	% Make sure to have biber as default bibliography tool (e.g. in Texstudio's build configuration)
 
 % --- Custom commands ---
 \input{custom-commands/custom-title-page}