Adjust button input vertical padding

Since line-height is `1.5`, the `-y` padding should have stayed the same at `.375rem` (that totals to `2.25rem` (`36px`) plus the borders, it's `2.375rem` (`38px)).

Author: pricop

scss/_root.scss

@@ -120,7 +120,7 @@ $root-tokens: defaults(
     --btn-input-bg: var(--bg-body),
 
     --btn-input-min-height: 2.375rem,
-    --btn-input-padding-y: .3125rem,
+    --btn-input-padding-y: .375rem,
     --btn-input-padding-x: .75rem,
     --btn-input-font-size: var(--font-size-base),
     --btn-input-line-height: var(--line-height-base),