fix(select): set placeholder option as selected if it doesn't have a value (#4885)

* fix(select): Set placeholder option as selected when no value

* auto update snapshots (#4892)

Co-authored-by: github-actions[bot] <41898282+github-actions[bot]@users.noreply.github.com>

* Create cyan-scissors-burn.md

* auto update snapshots (#4900)

Co-authored-by: github-actions[bot] <41898282+github-actions[bot]@users.noreply.github.com>

---------

Co-authored-by: github-actions[bot] <41898282+github-actions[bot]@users.noreply.github.com>

Author: mfranzke

.changeset/cyan-scissors-burn.md

@@ -0,0 +1,9 @@
+---
+"@db-ux/core-components": patch
+"@db-ux/ngx-core-components": patch
+"@db-ux/react-core-components": patch
+"@db-ux/v-core-components": patch
+"@db-ux/wc-core-components": patch
+---
+
+fix(select): set placeholder option as selected if it doesn't contain a value

__snapshots__/custom-select/showcase/webkit/DBCustomSelect-should-match-screenshot-1/DBCustomSelect-should-match-screenshot.png

@@ -238,7 +238,7 @@ export default function DBSelect(props: DBSelectProps) {
 				aria-describedby={props.ariaDescribedBy ?? state._descByIds}>
 				{/* Empty option for floating label */}
 				<Show when={props.variant === 'floating' || props.placeholder}>
-					<option class="placeholder" value=""></option>
+					<option class="placeholder" value="" selected={!props.value}></option>
 				</Show>
 				<Show when={props.options?.length} else={props.children}>
 					<For each={props.options}>