Fix focus variables

Author: simurai

src/forms/form-control.scss

@@ -86,7 +86,7 @@ textarea.form-control {
   &:focus {
     // stylelint-disable-next-line primer/borders
     border-color: $black-fade-30;
-    box-shadow: var(--color-input-shadow-focus);
+    box-shadow: var(--color-state-focus-shadow);
   }
 }
 

src/forms/form-validation.scss

@@ -236,7 +236,7 @@ dl.form-group > dd, // TODO: Deprecate
 
   &.focused {
     border-radius: $border-radius;
-    box-shadow: var(--color-input-shadow), var(--color-input-shadow-focus);
+    box-shadow: var(--color-input-shadow), var(--color-state-focus-shadow);
 
     .form-control {
       box-shadow: none;

src/utilities/colors.scss

@@ -45,7 +45,6 @@
 .color-bg-warning         { background-color: var(--color-bg-warning) !important; }
 .color-bg-warning-inverse { background-color: var(--color-bg-warning-inverse) !important; }
 
-
 //
 // ------------------------ Deprecated ------------------------
 // Some might get replaced at some point. If possible, use functional classes.