Update master.css

Author: DrMint

css/master.css

@@ -11,7 +11,7 @@
 body {
   font-family: 'Open Sans', sans-serif;
   background: var(--color-main-light);
-  background-image: url('/img/bg.png');
+  background-image: url('img/bg.png');
   background-blend-mode: multiply;
   background-size: 50rem;
   margin: 0;
@@ -76,4 +76,4 @@ input:focus-visible {
 a {
   color: var(--color-main-dark);
   text-decoration: none;
-}
+}