ui(editor): fix select dropdown border (#4632)

Fixes FER-

## Short description of the changes made
- fixes border color of editable component dropdowns

## What was the motivation & context behind this PR?

## How has this PR been tested?

Author: sbawabe

packages/fern-dashboard/src/components/editor/editor-component/EditorComponentPopover.tsx

@@ -178,7 +178,7 @@ function SelectControlComponent({
                 <SelectTrigger className="w-full">
                     <SelectValue placeholder={`Select ${name}`} />
                 </SelectTrigger>
-                <SelectContent>
+                <SelectContent className="border-border">
                     {control.options.map((option: string) => (
                         <SelectItem key={option} value={option}>
                             {option}