Fix filtering function for 2023 bug

public/js/paperfilter.js

@@ -109,7 +109,6 @@ function filter(year){
                 document.getElementById("filter2019").style.backgroundColor = "lightgrey"
                 document.getElementById("filter2020").style.backgroundColor = "lightgrey"
 				document.getElementById("filter2022").style.backgroundColor = "lightgrey"
-				document.getElementById("filter2023").style.backgroundColor = "lightgrey"
 				document.getElementById("filter2022").innerHTML = "2022"
 				document.getElementById("filter2019").innerHTML = "2019"
                 document.getElementById("filter2023").innerHTML = "2023 (" + count +")"