style(block-editor): wrap long @if condition in asset-by-url popover

Resolves the `nx format:check` CI failure caused by the inline @if
condition exceeding the prettier print width.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

Author: rjvelazco

core-web/libs/new-block-editor/src/lib/editor/components/asset-by-url-popover.component.ts

@@ -92,7 +92,9 @@ function urlValidator(control: AbstractControl): ValidationErrors | null {
                             autocomplete="off"
                             [placeholder]="urlPlaceholder()"
                             class="w-full text-sm" />
-                        @if (form.controls.url.touched && form.controls.url.errors?.['invalidUrl']) {
+                        @if (
+                            form.controls.url.touched && form.controls.url.errors?.['invalidUrl']
+                        ) {
                             <span class="text-xs text-red-600">
                                 {{ 'dot.block.editor.dialog.asset-by-url.field.url.invalid' | dm }}
                             </span>